Forging Forging is a manufacturing process involving the shaping of metal using localized compressive forces. The blows are delivered with a hammer or a die. Forging is often classified according to the temperature at which it is performed: cold forging, warm forging, or hot forging. The art of forging dates to at least 4000 BC and probably earlier. Metals such as bronze and iron were forged by early man to produce hand tools and weapons of war. The earliest recorded metal employed by humans app