This is the nature of the metal the frame is made of, Ti.

I have been on two Ti bikes (different brands), and I could not believe the amount of flex in the BB area. Now, whenever I see a Ti or steel bike with pretty lugs, I just admire/ogle the weld quality of the Ti and the lugs on the steel (no, me want). I always always will prefer a stiff, but not teeth-rattling stiff bike, as I am 210Ibs. Carbon frames for me right now, until some other frame material comparable to carbon in ride-quality shows up.

The only way I'll ever consider a Ti bike is if it were to be custom, and even then the fabricator must be someone with a reputation for making stiff-enough frames.