Titanium is widely used in various chemical reaction vessels and heat exchange equipment due to its excellent corrosion resistance, but the disadvantage is high cost. Especially when used as structural parts, this problem is especially prominent. The effective solution is to use titanium steel composite plates. The composite material of titanium and ordinary steel is called titanium steel composite, which has both corrosion resistance of titanium and ordinary steel plate as the strength of structure, and the cost is also greatly reduced.