diff --git a/api/streaming.py b/api/streaming.py
index 431060a8..c40d0d5e 100644
--- a/api/streaming.py
+++ b/api/streaming.py
@@ -3830,6 +3830,31 @@ def _get_aux_title_config() -> dict:
         return {}
 
 
+def _aux_title_generation_enabled() -> bool:
+    """Return whether automatic title generation is enabled (default: enabled).
+
+    Mirrors Hermes Agent's ``auxiliary.title_generation.enabled`` contract
+    byte-for-byte via its canonical ``is_truthy_value(value, default=True)``
+    semantics (agent/title_generator.py -> utils.is_truthy_value):
+
+      * ``None`` / missing -> default (True)
+      * ``bool`` -> unchanged
+      * ``str`` -> True ONLY when normalized into {"1", "true", "yes", "on"}
+        (an empty or unrecognized string is False, matching the agent — an
+        allowlist, NOT a "disable on false/0/no/off" blocklist)
+      * any other type -> ``bool(value)``
+    """
+    tg = _get_aux_title_config()
+    val = tg.get('enabled', True)
+    if val is None:
+        return True
+    if isinstance(val, bool):
+        return val
+    if isinstance(val, str):
+        return val.strip().lower() in ('1', 'true', 'yes', 'on')
+    return bool(val)
+
+
 def _aux_title_configured() -> bool:
     """Return True when any auxiliary title_generation config field is meaningfully set."""
     tg = _get_aux_title_config()
@@ -4355,6 +4380,9 @@ def _run_background_title_update(session_id: str, user_text: str, assistant_text
         from api import profiles as profiles_api
 
         with profiles_api.profile_env_for_background_worker(s, "background title", logger_override=logger):
+            if not _aux_title_generation_enabled():
+                _put_title_status(put_event, session_id, 'skipped', 'title_generation_disabled', current)
+                return
             aux_title_configured = _aux_title_configured()
             if agent and not aux_title_configured:
                 next_title, llm_status, raw_preview = _generate_llm_session_title_for_agent(agent, user_text, assistant_text)
@@ -4444,6 +4472,9 @@ def _run_background_title_refresh(session_id: str, user_text: str, assistant_tex
         from api import profiles as profiles_api
 
         with profiles_api.profile_env_for_background_worker(s, "background title", logger_override=logger):
+            if not _aux_title_generation_enabled():
+                _put_title_status(put_event, session_id, 'refresh_skipped', 'title_generation_disabled', effective)
+                return
             aux_title_configured = _aux_title_configured()
             if agent and not aux_title_configured:
                 next_title, llm_status, raw_preview = _generate_llm_session_title_for_agent(agent, user_text, assistant_text)
@@ -4505,6 +4536,8 @@ def generate_session_title_for_session(session, *, prefer_latest: bool = False,
     from api import profiles as profiles_api
 
     with profiles_api.profile_env_for_background_worker(session, "manual title regeneration", logger_override=logger):
+        if not _aux_title_generation_enabled():
+            return None, 'title_generation_disabled', ''
         next_title, llm_status, raw_preview = _generate_llm_session_title_via_aux(user_text, assistant_text, agent=agent)
     if next_title:
         return next_title, llm_status, raw_preview
diff --git a/docs/advanced-chat-setup.md b/docs/advanced-chat-setup.md
index 1d70c4ad..2a4d37ad 100644
--- a/docs/advanced-chat-setup.md
+++ b/docs/advanced-chat-setup.md
@@ -49,6 +49,33 @@ every new browser turn. The browser only receives a compact status event
 (`source`, `label`, message count, compaction metadata, and redacted errors),
 never the prefill message bodies.
 
+## Session title generation
+
+Hermes WebUI derives a provisional session title from the first user message
+and, after the first response, may call an LLM to generate a better title
+(and periodically refresh it for long sessions).
+
+Automatic title-generation LLM calls honor the active Hermes profile's
+`auxiliary.title_generation.enabled` setting (default: `true`):
+
+```yaml
+auxiliary:
+  title_generation:
+    enabled: false
+```
+
+When disabled:
+
+- the provisional first-message title stays in place and is never replaced
+  or overwritten by an automatic LLM call or local fallback;
+- the periodic adaptive refresh is skipped;
+- the explicit "regenerate title" action returns a
+  `title_generation_disabled` response instead of calling a title model.
+
+The WebUI's `auto_title_refresh_every` setting remains a separate control for
+periodic refreshes of already-generated titles; it does not re-enable
+automatic generation when the auxiliary flag is off.
+
 ## Gateway-backed browser chat
 
 By default, browser chat runs through WebUI's in-process legacy runtime. Advanced
diff --git a/tests/test_issue6814_title_generation_enabled_gate.py b/tests/test_issue6814_title_generation_enabled_gate.py
new file mode 100644
index 00000000..fb63f392
--- /dev/null
+++ b/tests/test_issue6814_title_generation_enabled_gate.py
@@ -0,0 +1,206 @@
+"""Regression tests for issue #6814: auxiliary.title_generation.enabled=false
+must disable WebUI automatic title-generation LLM calls.
+
+Covers:
+  1. enabled=false + aux route configured -> neither aux nor agent LLM runs,
+     provisional title untouched, status skipped/title_generation_disabled.
+  2. enabled=false + no aux route -> active agent model is NOT used.
+  3. enabled omitted / truthy -> existing default-on behavior preserved.
+  4. string and boolean false forms parse identically (canonical parser).
+  5. adaptive refresh path honors the flag.
+  6. manual regenerate path returns an explicit disabled response.
+  7. helper unit cases (default, bool, string forms).
+"""
+
+import threading
+from unittest.mock import MagicMock, patch
+
+import pytest
+
+from tests._aux_client_helpers import auxiliary_client_modules, patch_tg_config
+
+
+@pytest.fixture(autouse=True)
+def _install_auxiliary_client_modules():
+    with auxiliary_client_modules():
+        yield
+
+
+def _make_provisional_session(user_text, assistant_text='Here is the answer.'):
+    from api.models import title_from
+    messages = [
+        {'role': 'user', 'content': user_text},
+        {'role': 'assistant', 'content': assistant_text},
+    ]
+    provisional = title_from(messages, 'Untitled')
+    s = MagicMock()
+    s.title = provisional
+    s.llm_title_generated = False
+    s.messages = messages
+    s.session_id = 'test-6814-session'
+    s.save = MagicMock()
+    return s, provisional
+
+
+def _run_update(session, provisional, events):
+    from api.streaming import _run_background_title_update
+    _run_background_title_update(
+        session_id=session.session_id,
+        user_text=str(session.messages[0]['content']),
+        assistant_text=str(session.messages[1]['content']),
+        placeholder_title=provisional,
+        put_event=lambda e, d: events.append((e, d)),
+        agent=None,
+    )
+    return events
+
+
+@pytest.mark.parametrize('disabled_value', [False, 'false', '0', 'no', 'off'])
+def test_disabled_skips_llm_and_keeps_provisional_title(disabled_value):
+    """enabled=false (any canonical form) with an aux route configured:
+    no LLM call, provisional title untouched, skipped status."""
+    from api.streaming import _run_background_title_update
+    user_text = 'Design a REST API for user management.'
+    s, provisional = _make_provisional_session(user_text)
+    events = []
+    with patch('api.streaming.get_session', return_value=s), \
+         patch('api.streaming.SESSIONS', {}), \
+         patch('api.streaming.LOCK', threading.Lock()), \
+         patch_tg_config({'provider': 'openai', 'model': 'gpt-x', 'enabled': disabled_value}), \
+         patch('api.streaming._generate_llm_session_title_via_aux') as mock_aux, \
+         patch('api.streaming._generate_llm_session_title_for_agent') as mock_agent:
+        _run_update(s, provisional, events)
+
+    mock_aux.assert_not_called()
+    mock_agent.assert_not_called()
+    assert s.title == provisional  # untouched
+    s.save.assert_not_called()
+    statuses = [d for e, d in events if e == 'title_status']
+    assert statuses and statuses[0]['status'] == 'skipped'
+    assert statuses[0]['reason'] == 'title_generation_disabled'
+    # stream_end must still be emitted (finally block)
+    assert any(e == 'stream_end' for e, _ in events)
+
+
+def test_disabled_without_aux_route_does_not_use_agent_model():
+    """enabled=false with no aux route: the active chat model must NOT be
+    used as a fallback (the original bug path)."""
+    from api.streaming import _run_background_title_update
+    user_text = 'Explain quantum entanglement simply.'
+    s, provisional = _make_provisional_session(user_text)
+    events = []
+    with patch('api.streaming.get_session', return_value=s), \
+         patch('api.streaming.SESSIONS', {}), \
+         patch('api.streaming.LOCK', threading.Lock()), \
+         patch_tg_config({'enabled': False}), \
+         patch('api.streaming._generate_llm_session_title_for_agent') as mock_agent:
+        _run_update(s, provisional, events)
+
+    mock_agent.assert_not_called()
+    assert s.title == provisional
+    statuses = [d for e, d in events if e == 'title_status']
+    assert statuses[0]['status'] == 'skipped'
+    assert statuses[0]['reason'] == 'title_generation_disabled'
+
+
+def test_enabled_omitted_preserves_default_on_behavior():
+    """enabled omitted (default true): existing behavior — LLM title runs
+    and replaces the provisional title."""
+    from api.streaming import _run_background_title_update
+    user_text = 'Write a haiku about the moon.'
+    s, provisional = _make_provisional_session(user_text)
+    events = []
+    with patch('api.streaming.get_session', return_value=s), \
+         patch('api.streaming.SESSIONS', {}), \
+         patch('api.streaming.LOCK', threading.Lock()), \
+         patch_tg_config({'provider': 'openai', 'model': 'gpt-x'}), \
+         patch('api.streaming._generate_llm_session_title_via_aux',
+               return_value=('Moon Haiku', 'llm_aux', 'Moon Haiku')):
+        _run_update(s, provisional, events)
+
+    assert s.title == 'Moon Haiku'
+    s.save.assert_called()
+    assert s.llm_title_generated is True
+
+
+def test_enabled_true_string_parses_as_enabled():
+    from api.streaming import _aux_title_generation_enabled
+    with patch_tg_config({'enabled': 'true'}):
+        assert _aux_title_generation_enabled() is True
+    with patch_tg_config({'enabled': 'True'}):
+        assert _aux_title_generation_enabled() is True
+
+
+def test_refresh_path_honors_disabled():
+    """Adaptive refresh worker must skip when the flag is false."""
+    from api.streaming import _run_background_title_refresh
+    s = MagicMock()
+    s.title = 'Existing LLM title'
+    s.llm_title_generated = True
+    s.messages = [{'role': 'user', 'content': 'u'}, {'role': 'assistant', 'content': 'a'}]
+    s.session_id = 'test-6814-refresh'
+    s.save = MagicMock()
+    events = []
+    with patch('api.streaming.get_session', return_value=s), \
+         patch('api.streaming.SESSIONS', {}), \
+         patch('api.streaming.LOCK', threading.Lock()), \
+         patch_tg_config({'enabled': False}), \
+         patch('api.streaming._generate_llm_session_title_via_aux') as mock_aux, \
+         patch('api.streaming._generate_llm_session_title_for_agent') as mock_agent:
+        _run_background_title_refresh(
+            session_id=s.session_id,
+            user_text='u', assistant_text='a',
+            current_title=s.title,
+            put_event=lambda e, d: events.append((e, d)),
+            agent=None,
+        )
+    mock_aux.assert_not_called()
+    mock_agent.assert_not_called()
+    statuses = [d for e, d in events if e == 'title_status']
+    assert statuses and statuses[0]['status'] == 'refresh_skipped'
+    assert statuses[0]['reason'] == 'title_generation_disabled'
+
+
+def test_manual_regenerate_returns_explicit_disabled():
+    """Explicit manual regenerate returns an explicit disabled response
+    instead of calling any title LLM."""
+    from api.streaming import generate_session_title_for_session
+    s = MagicMock()
+    s.title = 'Whatever'
+    s.llm_title_generated = False
+    s.messages = [
+        {'role': 'user', 'content': 'First user message here'},
+        {'role': 'assistant', 'content': 'First answer here'},
+    ]
+    s.session_id = 'test-6814-manual'
+    with patch_tg_config({'enabled': False}), \
+         patch('api.streaming._generate_llm_session_title_via_aux') as mock_aux, \
+         patch('api.streaming._generate_llm_session_title_for_agent') as mock_agent:
+        result = generate_session_title_for_session(s)
+    assert result == (None, 'title_generation_disabled', '')
+    mock_aux.assert_not_called()
+    mock_agent.assert_not_called()
+
+
+@pytest.mark.parametrize('cfg,expected', [
+    ({'provider': 'openai', 'model': 'gpt-x'}, True),          # omitted -> default on
+    ({'enabled': True}, True),
+    ({'enabled': False}, False),
+    ({'enabled': 'true'}, True),                                # allowlist -> on
+    ({'enabled': 'on'}, True),
+    ({'enabled': '1'}, True),
+    ({'enabled': 'yes'}, True),
+    ({'enabled': 'false'}, False),
+    ({'enabled': '0'}, False),
+    ({'enabled': 'no'}, False),
+    ({'enabled': 'off'}, False),
+    ({'enabled': 'FALSE'}, False),
+    # Canonical is_truthy_value(default=True): an allowlist, not a blocklist.
+    ({'enabled': ''}, False),                                   # empty string -> NOT truthy -> off
+    ({'enabled': 'garbage'}, False),                            # unrecognized string -> off
+    ({'enabled': None}, True),                                  # explicit null -> default (on)
+])
+def test_helper_parses_enabled_forms(cfg, expected):
+    from api.streaming import _aux_title_generation_enabled
+    with patch_tg_config(cfg):
+        assert _aux_title_generation_enabled() is expected