What are the differences between quenching and annealing in the context of heat treatment processes?

Quenching and annealing are two different heat treatment processes used to alter the properties of metals. Quenching involves rapidly cooling a metal after heating it to make it harder and stronger, while annealing involves slowly cooling a metal to make it softer and more ductile. Quenching results in a hardened metal with increased strength, while annealing results in a softer metal with improved machinability.