During this stage, the club head is reheated to a temperature of 800-900°C. By allowing it to cool and then be reheated, the shape of the head is maintained while still allowing the grain structure to be manipulated. This is an additional and time-consuming step but is responsible for what Miura refers to as W.D.D. Accurate Forged. During this step the weight, distribution, and density of the club head are defined.
In order to reach this stage, the Miura factory has produced three individual sets of dies for each model and loft. Dies alone will not deliver a quality iron—each model needs a precise amount of heat and force. Forging also requires the skill, patience, and experience of a Miura craftsman.