Problems with titanium alloys

Titanium alloy has the advantages of light weight, high specific strength, and good corrosion resistance, making it widely used in the automotive industry. The most commonly used titanium alloy is in automotive engine systems. There are many benefits to using titanium alloy to manufacture engine parts.
The low density of titanium alloy can reduce the inertia mass of moving parts, while titanium valve springs can increase free vibration, weaken body vibration, and increase engine speed and output power.
Reduce the inertia mass of moving parts, so as to reduce friction and improve the fuel efficiency of the engine. Choosing titanium alloy can reduce the load stress of related parts, reduce the size of parts, and thus reduce the mass of the engine and the entire vehicle. The reduction of inertia mass of components reduces vibration and noise, improving engine performance. The application of titanium alloy in other components can improve personnel comfort and the aesthetics of cars. In the automotive industry, titanium alloys have played an immeasurable role in energy conservation and consumption reduction.
Despite its superior performance, titanium alloy components still have a long way to go from being widely used in the automotive industry, due to issues such as high prices, poor formability, and poor welding performance.
The main obstacle to the widespread application of titanium alloys in the automotive industry is still the high cost.
Whether it is the initial smelting or subsequent processing of metals, the price of titanium alloys is much higher than that of other metals. The cost of titanium parts that the automotive industry can accept is $8-13/kg for connecting rods, $13-20/kg for gas valves, and $8/kg for springs, engine exhaust systems, and fasteners. It is 6-15 times that of aluminum sheet and 45-83 times that of steel sheet.