rlange - 4:05 pm on Oct 31, 2011 (gmt 0)
For example, suppose my chosen page title is "Antique Widgets" and my home page title is "All Abut Widgets". When someone searches for "antique widgets" [without quotes], then the title that Google displays in the SERPs is:
Antique Widgets -- All About Widgets
In other words, Google appends a dash mark followed by the title of the home page. So even though my original title exactly natches the search terms, Google still changes it.
Hmm... Your post subject make it sounds as if your issue is that when a user searches for "antique widgets", your page, titled "Antique Widgets", is shown in the results, but Google has changed the title to something other than "Antique Widgets".
But I think what you're actually trying to say is that Google is changing the title of the returned page to match the user's query even if you have a different page whose title exactly matches that query already. Is that correct?