Three line, used in ships.Ship sea system pipeline due to direct contact with seawater and largely arranged on the bottom of the tank, harsh working environment, is restricted by the corrosion of the maximum efficiency of the outstanding problems.Fourth, used in ship propeller.Titanium alloy high strength, light quality, excellent cavitation erosion resistance and fatigue resistance, is an ideal material to manufacture the propeller.Made of ZTi6Al4V is copper alloy screw propeller for three times.0 pt;The oledata.mso - the font - kerning: 0.0000 pt;">Because the titanium and titanium alloy in seawater has more excellent than other alloy corrosion resistant performance, compared with the commonly used copper alloy and high strength, low density, can increase the water flow velocity through the thin wall thickness reduction and to ensure that the heat transfer efficiency.