It seems title searching doesn't get hits on partial words ("gbatemp" search won't hit on gbatemp.net)
Whereas, normal searching does get hits on partial words in the title.
Note: normal searching = don't click "search titles only".
I would expect the opposite. Wouldn't you ?
Title searching = user taking the time to narrow the focus of the search (easier on the server CPU, RAM) and should be rewarded with partial hits.