technique for forming steel is heating it until it is red hot and then
hammering it against an anvil. Obtaining the desired shape, however, is
a highly skilled process and repeatability is difficult to achieve. By
using specially shaped dies to create the desired form, forging has developed
into an industrial process.
This is very
similar to forging but, as the name implies, heat is not involved and
it tends to be used to produce smaller components such as rivets, bolts