To anneal or toughen by a process of gradually heating and cooling; SYN. temper.
to heat and cool metal gradually to temper.
strengthen; temper, especially by subjecting to great heat and slow cooling.

To keep cool in a refrigerator

To anneal or toughen by a process of gradually heating and cooling; SYN. temper.
to heat and cool metal gradually to temper.
strengthen; temper, especially by subjecting to great heat and slow cooling.