Different aluminium alloys can be subjected to a range of heat treatments:
- Homogenisation: after casting, alloys are heated to remove
any segregation, i.e. to obtain a homogenous composition throughout the alloy.
- Annealing: strain-hardening alloys (1xxx, 3xxx and 5xxx)
can be softened after cold working.
- Solution heat treatment of precipitation hardening alloys prior to ageing in order to take alloy elements into solution.
- Precipitation or age hardening: 2xxx, 6xxx and 7xxx alloys
can be strengthened by precipitation hardening, or 'ageing'.
- Stoving (e.g. to 'cure' a paint or lacquer coating)