martemper

Blend of martensite +‎ temper.

martemper (third-person singular simple present martempers, present participle martempering, simple past and past participle martempered)

1. (transitive) To subject (steel) to a heat treatment involving austenitization followed by step quenching (at a rate fast enough to avoid the formation of ferrite, pearlite or bainite), used to produce martensite under relatively low stress.