Typically, no particular action is taken to do so.

You inspect the end piece for deficiencies, and then test it accordingly.

From a stress analysis standpoint, this means that you should increase the OD and decrease the WT per the bending limits.

Over time, the stresses induced through bending should abate as a function of temperature and material. Normalization could be used to speed the process up, and may be warranted in critical applications.

However, I qualify the previous statements as not being a metallurgist.

I'll also note that for critical applications, you'll often see significant padding of thickness as a safety margin of error.