[Cory]

Expensive, hard to work with, not as easy to weld as aluminum, greater density than aluminum, which requires you to use less material to achieve same strength. This sounds good, but it means if you want to maximize your strength to weight ratio you need to change how you design your parts, which may require more analysis than it's worth.

It has plenty of advantages, just not so much in FRC. Since most power transmission components are steel off the shelf, shafts are the one place you could apply Ti. Since you could easily substitute 7075/7068, with infinitely better machinability, it would be hard to justify the use of Ti.