Replacing steel springs with titanium alloy springs can reduce weight by 40% -60% when applied to suspension springs. Titanium alloy springs have corrosion resistance and damping properties, which not only increase the mileage, but also make the vehicles more controllable and comfortable. Through an example of suspension springs used in racing cars, this paper will provide a detailed introduction to design and prepare titanium spring. The calculated helix angle of titanium suspension spring is 9.45°, which exceeds the range of steel spring design standards. So, the design equations for titanium spring have been revised here. In addition, the influence of temperature on the titanium spring rate is investigated. With the increase of temperature, the titanium spring rate decreases gradually.