Ịrụ ọkụ na-ekpo ọkụ bụ usoro ịrụ ọrụ ígwè nke ọla na-eme ka ọ dị elu karịa okpomọkụ ha recrystalization, nke na-enye ohere ka ihe ahụ na-ejigide ọdịdị ya nwere nkwarụ ka ọ na-ajụ oyi.Otú ọ dị, ndidi na-eji na-ekpo ọkụ forging na-adịkarịghị ka ike dị ka oyi forging. The oyi forging n'ichepụta usoro na-eme ka ike nke a metal site nje hardening na a ụlọ okpomọkụ.N'ụzọ megidere nke a na-ekpo ọkụ forging n'ichepụta usoro na-eme ka ihe si nje hardening na elu okpomọkụ, nke na-arụpụta kacha mkpụrụ ike, ala ike ike na elu ductility.