US Patent 7846039 Golf club head

A golf club head having a multi-material face is disclosed and claimed. The face is formed by explosion welding, allowing materials having substantially different properties to be uniformly joined. Explosion welding allows the materials to be joined together via a cold-working process, allowing them to joined without losing their pre-bonded properties. Thus, the golf club head have a hard, wear resistant material as the ball-impacting face surface explosion welded to a softer material, allowing the multi-material face to be joined to a soft body material such that the body can be bent and customized. The multi-material face also allows for improved playing characteristics by allowing the club designer to use a thinner face and lighter body material while still providing improved face wear resistance and durability.