Abstract: A method for producing a golf club head having a weight block includes providing a club head body formed of a titanium alloy. The club head body includes a surface having a coupling portion. A weight block formed of a tungsten-copper-nickel alloy is provided and includes 1-17 wt % of copper and 6-37 wt % of nickel, with the balance being tungsten. The tungsten-copper-nickel alloy has a specific weight of 12-17 g/cm3. The weight block is placed into the coupling portion of the club head body, and a welding heat source is applied to abutting portions of the weight block and the coupling portion to proceed with fusion welding, tightly engaging the weight block with the coupling portion of the club head body.