I noted in the printed sheet about the various filaments that there is an entry that stipulates recommended post-print annealing times. Say, 6 hours at 80C or so depending on the filament type.
I tried it with PLA, just for the sake of trying, and probably used too much heat. It warped the parts badly. For some materials it’s probably worthwhile but I don’t see people talking much about it so I reckon it’s not very common.