How do you soften harden steel?

To soften hardened steel, a process called annealing is typically used. This involves heating the steel to a specific temperature (usually between 1,500°F to 1,600°F or 815°C to 870°C) and then allowing it to cool slowly, often in a furnace or covered in insulating material. This process relieves internal stresses and reduces hardness, making the steel more workable. After annealing, the steel can be machined or shaped more easily.