Forging is processing method that uses pressure to change the shape of the metal using molds. Based on the working temperature it is separated into either hot forging (above crystallization temperature ~ under solidus), or cold forging (forming at normal temperature) and warm forging (between hot forging and cold forging).

Forging consists of heating the blank then forming it to a certain shape by hand press, forging press, or machine press; the workpiece is called “a forging” or “the forging”. Forging changes the metal structure improving its mechanical properties. Typically resulting in a part that has more grain refinement and is tougher and less brittle.