The Elastic modulus of Pure Titanium and titanium alloy is around 100 GPa, only half of steel, and with high drop strength (shown as the following picture), it can be used in springs, golf head etc.
The range of Elastic modulus and drop strength for kinds of metals
Usually Golf head are made of Ti-6Al-4V by precision casting machining, Ti-6Al-4V, hitting side is using the material titanium alloy (Ti-4.5Al-3V-2Mo-2Fe) and 15-5-3 (Ti-15Mo-5Zr-3Al). The report pointed out that the ball should be used titanium alloy, the player will hit a ball while increasing average distance of 20%. If the spring is made of titanium alloy with low elastic modulus, the number of titanium coils is less than the number of the steel spring in the same elasticity. The weight of the titanium spring is only 28% of the steel spring, which can save energy consumption and increase the wheel speed, such as advanced F1 racing and motorcycle springs are all made of titanium alloy.
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