Application of titanium and titanium alloy in shipbuilding is very extensive, as hull structure, deep-sea research vessel and submarine pressure hulls, pipelines, valves, rudder, shaft bracket, fittings, in the power-driven propellers and propeller shafts, heat exchangers, coolers, hull sonar dome and so on. Also, titanium equipment also for marine fisheries, and marine heat conversion, field, as Japan in artificial farming technology in the, large using has titanium metal network and maintained must seawater temperature of titanium tube type hot Exchange device,; in marine heat conversion field, United States, and Japan of temperature power station of main equipment evaporator, and gel shrink device and the seawater straw, and loop system, are using has titanium business equipment, are made has good of effect. Desalination unit in the early use of copper alloy and carbon steel materials, these materials are not resistant to seawater corrosion, low productivity, and soon was replaced by the excellent corrosion resistance of titanium. In seawater desalination, desalination plant is the main application of titanium heater heat transfer tube. Japan a company built for the Saudi daily capacity of 30,000 tons of fresh water distillation unit 10, titanium Tubes 3200 tons, an average of 10,000 ton/day plant, needed titanium 107 tons. China's Tianjin, Shandong and other places are built or under construction in desalination unit. Offshore oil production equipment including the platforms and ancillary equipment, ancillary equipment oil coolers, l tubing, pumps, valves, fittings and fixtures. These are with sea water and oil in the sulphides, ammonia, chlorine and other media contacts. Since Titanium has excellent corrosion resistance in these media, so the United States use in their oil fields in the early 70 's the backbone of titanium manufacturing offshore oil platforms, and made of titanium tubular heat exchanger and plate heat exchangers. United States oil drilling platform in the North Sea about 100 titanium heat exchanger.