I saw this on YouTube earlier this evening. He does say in the video that this is anecdotal, so take it with a grain of salt. On the other hand if it really does work. that's cool.
Titanium isn't a great screw material IMO. It tends to flex too muchYamaha is doing this on the Billy Sheehan (and now others too) Attitude line of basses. They put in a pair of screws at an angle that pulls the neck firmly into the pocket. Billy says in one of his rig rundown videos that I makes a world of difference.
I have noticed on multiple cheaper guitars that I have that installing Fender neck screws in place of the cheap wire-grade screws that came from the factory makes a big and noticeable difference. Using stainless steel screws a la Callaham makes an event bigger difference, to the tune of "wow, that's amazing!"
I haven't found any titanium neck screws......yet.