Abstract: A method for manufacturing a golf club head includes aging heat treat a sheet material made of a titanium alloy at 650-750° C. for 10-12 hours to obtain an aging heat treated sheet material. The aging heat treated sheet material is hot rolled to form a striking plate. The striking plate is annealed at 700-800° C. for 30-60 minutes to obtain an annealed striking plate. The annealed striking plate is welded to a club head body made of the titanium alloy to form a semi product. The semi product of the golf head is annealed at 500-700° C. for 30-240 minutes to obtain the golf club head. Thus, the golf club head with a Young's modulus higher than 119 GPa can be manufactured.

Abstract: Provided is a titanium alloy for casting a golf club head used to solve the problem of the poor formation rate of the vacuum centrifugal casting method under the use of the conventional titanium alloy. The alloy includes 7.0-8.0 wt % of aluminum (Al), 4.0-5.5 wt % of vanadium (V), 0.5-1.5 wt % of chromium (Cr), 0.05-0.15 wt % of silicon (Si) and 0.05-0.3 wt % of iron (Fe). The others are titanium (Ti) and inevitable impurities.

Abstract: A method for manufacturing a golf club head includes aging heat treat a sheet material made of a titanium alloy at 650-750° C. for 10-12 hours to obtain an aging heat treated sheet material. The aging heat treated sheet material is hot rolled to form a striking plate. The striking plate is annealed at 700-800° C. for 30-60 minutes to obtain an annealed striking plate. The annealed striking plate is welded to a club head body made of the titanium alloy to form a semi product. The semi product of the golf head is annealed at 500-700° C. for 30-240 minutes to obtain the golf club head. Thus, the golf club head with a Young's modulus higher than 119 GPa can be manufactured.