Temperare (to mix correctly) is the Latin origin of words like "temperature" and "tempering"; it and "tempo" come, in turn, from tempus (time or season). Thus, the word "temper" can refer (at least informally) to any time- and temperature-sensitive process (as for chocolate tempering or tempered glass), a material's thermo-mechanical history (including cold work and cryogenic hardening), or even its composition.
Temper may mean:
Aluminum alloy. Advances for Ground Vehicles: A ballistic temper developed for aluminum-lithium alloy 2195 enables military vehicles to cut weight while retaining armor capabilities.
Feb 01, 2002; Glen H. Nickodemus Lawrence S. Kramer Joseph R. Pickens Matthew S. Burkins The Combat Vehicle Research program, sponsored by...