Originally Posted by
davidad
It is prone to fatigue fractures and requires a skilled weldor and proper gas shielding until the weldment cools below 800F.
Yes Ti requires a skilled welder and proper inert gas shielding of the welds. It is not prone to fatigue cracking if designed properly so the stresses are below a threshold value. In this regard it is similar to steel in that it's fatigue life can be infinite. Aluminum does not share this characteristic.