Titanium alloy rod refers to the alloy composed of other elements in titanium element. Titanium alloy rod has the characteristics of low density, high strength, good toughness and excellent corrosion resistance. In the manufacture of ship structure, titanium alloy rod is used to greatly improve the performance of equipment. First of all, from its strength performance, the general density of titanium alloy is about 4.5g/m3, the density is only 60% of the steel material, but the strength is much higher than the steel material, the use of titanium alloy in the hull can be made of light weight, high strength parts. Secondly, from the point of view of corrosion resistance, titanium alloy has a natural advantage in ship construction, its corrosion resistance is far more than stainless steel. Moreover, it has strong corrosion resistance to alkali, chloride or chlorine organic materials, nitric acid and so on [1]. In both clean and contaminated seawater, the titanium alloy remains passive, with an almost negligible corrosion rate of just 0.00076pm/a. At the same time, titanium alloy material has good low temperature performance, can maintain good physical properties in the low temperature environment of the ocean, the use of temperature between 300 ~ 600C. Its strength is also much higher than other alloys at -296° C. Various performance of titanium alloy is more in line with the requirements of ship design and construction, so it has been used as a large submarine, deep-sea submersible and other equipment shell main material, Russia as the world's first use of titanium alloy pressure shell country, its titanium alloy production process has long been in the world's leading position. Specifically, according to the use of titanium alloy in the hull position, can be divided into shell titanium alloy, power engineering titanium alloy and ship machinery titanium alloy. According to its characteristics can be divided into weldable structure titanium alloy, high strength titanium alloy, heat resistant titanium alloy, etc.