Titanium gold, also known as space metal, has future characteristics. It is tough, corrosion-resistant, silvery white, will not turn black, and is not allergic to anyone. It is the only metal that has no effect on human autonomic nerves. Its unique silver-gray tone has a good performance in high polishing, mercerizing and matt. Besides gold and silver, the most suitable jewelry material is commonly known as titanium gold on the market.

Generally speaking, titanium gold is mainly used in engineering and aviation industry. Pure titanium and titanium alloys have only recently been used as jewelry, and their popularity index is rising. At present, there are pure titanium jewelry on the domestic market, but it is really rare. Titanium ornaments on the market mainly contain titanium metal, not pure titanium.

Titanium alloy is an alloy based on titanium and added with other elements. There are two kinds of isomorphic crystals of titanium: α titanium with dense hexagonal structure below 882℃ and β titanium with body-centered cubic structure above 882℃.

According to the influence of alloying elements on phase transition temperature, alloying elements can be divided into three categories:

① The elements that stabilize the α phase and increase the phase transition temperature are α stable elements, including aluminum, carbon, oxygen and nitrogen. Among them, aluminum is the main alloying element of titanium alloy, which plays an obvious role in improving the strength of the alloy at room temperature and high temperature, reducing the specific gravity and improving the elastic modulus.

② The elements that stabilize the β phase and lower the phase transition temperature are β stable elements, which can be divided into isomorphic and * * * precipitation types. The former includes molybdenum, niobium and vanadium. The latter includes chromium, manganese, copper, iron and silicon.

③ The elements that have little influence on the phase transition temperature are neutral elements, such as zirconium and tin.