4. Industrial materials with superplastic behavior

4.1 Titanium alloys

The superplasticity of titanium alloys has been known for around thirty years, and this property quickly attracted sustained interest for the shaping of parts due to the following facts: these alloys exhibit superplastic behavior under conventional processing conditions; superplastic forming can be advantageously combined with diffusion bonding to produce aerospace structural parts with very high mechanical properties and very low mass; no significant damage occurs during superplastic deformation. On the other hand, these alloys are expensive and difficult to form using traditional forming and machining techniques.

Around fifteen grades were made superplastic in the 1980s, the most important being the TA 6 V alloy, whose superplastic forming...