Forging
Forging is a way of making things.  It involves changing the shape of metal by using compressive forces.  These forces are normally supplied by hitting the metal with a hammer or a die.  There are different types of Forging based on the temperature at which the forging is done. These include cold forging, warm forging, and hot forging. For warm and hot forging, the metal is heated. This is usually done in a forge. Things can be forged in many different sizes. They can range in weight from less than a kilogram to hundreds of metric tons. Forging has been done by smiths for a very long time. Common products made by forging include kitchenware, hardware, hand tools and weapons such as swords and axes.