How to temper a non-ferrous metal
Most non-ferrous alloys are heated in order to form a solution.
Techniques:
Annealing:
Most non-ferrous alloys that are heat-treatable are also annealed to relieve the hardness of cold working. These may be slowly cooled to allow full precipitation of the constituents and produce a refined microstructure.
Different annealing techniques are subjected with non-ferrous alloys like  recrystallization annealing, partial annealing, full annealing, and final annealing.

Quenching
Quenching is a process of cooling a metal at a rapid rate. This is most often done to produce a martensite transformation. In ferrous alloys, this will often produce a harder metal, while non-ferrous alloys will usually become softer than normal.


Reference: Wikipedia