I have read that Titanium is a poor steel for any gun. It will not function with other metals without galling, It is strong but doesn't wear. You can make something out of it but it is junk when done, and thats if it doesn't burn up in the machining.

S7 vacuum arc remelt steel is supposed to be the best material known today, made of the strongest and purest steel on earth. There are some other more exotic and stronger steels, but no one has ever really used them in arms with any success.

The lighter the gun the bigger the kick, so ok if you love recoil. #makesyourteethloose.