Search results show about the first 60 characters of a page title. Longer titles are cut off, and audit tools report them.
Why Joomla sites get it
The page title (the <title> tag) is not just the article’s headline. If Site Name in Page Titles is set in Global Configuration → Site, Joomla adds “- Your Site Name” to every page title, so a headline that looks a reasonable length can still produce a title over 60 characters. Shortening the headline itself is rarely what you want, because it is what readers see at the top of the page.
Fix it by hand
- Open the article and go to the Options tab.
- Fill in Browser Page Title with a shorter version of the headline. Joomla uses it for the page title instead of the headline, and still adds the site name.
- Keep the title plus the site name to 60 characters or fewer, and save.
Fix it with MetaGen
MetaGen’s Title too long check measures the title search engines actually see: the Browser Page Title if the article has one, otherwise the headline, plus your site name. Fix fills in a shorter Browser Page Title, cut at a word boundary, and leaves the headline as written. Check the shortened titles in Articles changed; for an important page you may prefer to write your own.
MetaGen is free for Joomla 5 and 6. See all the SEO warnings MetaGen checks.