Linked from
The 13 pages that link to Tempering, each with the reason it gives.
SteelRelated: Tempering reduces quench brittleness and balances steel's hardness with toughness.
BlacksmithingRelated: It can follow hardening operations used in making durable forged tools.
Tool steelRelated: Tempering trades some as-quenched hardness for the toughness needed in service.
Alloy steelRelated: Alloy elements influence tempering response and resistance to softening.
Dark chocolateRelated: Proper tempering gives dark chocolate gloss, snap, and resistance to bloom.