Why is titanium material more resilient in cold stamping or cold bending? What are the influencing factors?

The bounce-back of titanium in cold stamping or cold bending is large, because the ratio of the yield limit to the elastic modulus of titanium is large. Cold stamping or cold forming is a combination of plastic and elastic deformation of the processing technology, when the pressed or bending workpiece is unloaded, the elastic deformation part of the workpiece to try to restore the original state and rebound. Elastic rebound makes the volume, degree and radius of the workpiece change, which affects the machining accuracy of the workpiece. There are many factors affecting rebound, the most important of which are the following:
a. The harder the material, the greater the rebound;
b. The lower the elastic modulus, the higher the yield limit and the larger the rebound;
c. When the bending Angle is a certain value, the thicker the workpiece, the greater the stress on the outer edge, the greater the plastic deformation, the smaller the rebound;
d. The greater the degree of deformation, the greater the resilience;
e. The rebound amount of unidirectional bending is larger than that of multi-angle bending;
f. The rebound amount of free bending is 3 times larger than that of stamping with the die;
g. The higher the degree of cold hardening of the metal, the greater the rebound;
h. As the temperature of the workpiece rises during stamping or bending, the resilience decreases;