Titanium is a transition metal, over a period of time people think it is a rare metal. From the 1940s onwards, titanium and its compounds are widely used in aircraft, rockets, missiles, satellites, spacecraft, ships, military, medical and petrochemical fields. Because titanium has a high melting point, hardness, plasticity, density, corrosion-resistant advantages.

Titanium appearance similar to steel, with silver gray light translation. The strength of titanium, titanium alloy tensile strength of 180kg/mm3. Characteristics of titanium is the density (4.51g/cm3), high hardness, high melting point (1675 ° C), high-purity titanium has good plasticity, but when there are impurities becomes brittle and hard. Titanium when the room is not the chlorine, sulfuric acid, dilute hydrochloric acid and nitric acid, but can be hydrofluoric acid, phosphoric acid, molten alkali erosion. Titanium is very easily dissolved in H2SO4, titanium the most prominent performance is strong resistance to corrosion in seawater. Titanium about 0.42% of the total weight of the earth's crust, ranked seventh in the metal world, as many as 70 of the titanium-containing mineral variety.

Titanium-use development soon, has been widely used in aircraft, rockets, missiles, satellites, spacecraft, ships, military, light industry, chemical industry, textile, medical and petrochemical and other fields.
       Fine titanium powder, rocket fuel; corrosion resistance of titanium, 15 times stronger than the commonly used stainless steel, more than 10 times longer life than stainless steel. Titanium in surgical procedures, but also very fascinating. At present, surgical bone is stainless steel, stainless steel there is a drawback, bone healing, stainless steel sheet should be taken out, this is a very painful thing. Otherwise, the stainless steel will rust on the body harm. If you switch to titanium artificial bones will allow orthopedic technology is completely different. Place where the head is damaged, with titanium plate and titanium screws, nails, a few months, the bone will re-grow in the holes of the titanium plate and screws, the new muscle fibers wrapped in sheets of titanium, titanium bone like a real bones and flesh and blood linked to underpin and reinforce the role of, titanium was praised as "pro-bio-metal. Now it has been applied to the knee, shoulder, rib joints, skull, active heart valves, bone clip, and so on.
       In the steel industry, a small amount of titanium is good deoxidation of nitrogen removal and desulphurization agents. Dioxide is a valuable than titanium white pigment called titanium dioxide. Titanium dioxide both white lead to cover up the performance and zinc white, durable performance, it is one of the world's most white substance, and titanium dioxide non-toxic. Now every year hundreds of thousands of tons of titanium dioxide pigments.
       The nature of titanium dioxide has a high melting point, often used to manufacture fire-resistant glass, glaze, enamel, clay, resistant to high experimental utensils and so on.
    Titanium tetrachloride in the moist air will smoke a lot of white smoke. Because it has this feature, the military used it as a man-made aerosols. In particular, the release of titanium tetrachloride in the oceans, water vapor, smoke like a white Great Wall, live in the sight of the enemy.
         Barium titanate crystals are widely used in ultrasonic instruments and underwater detectors. This is because with pressure cut to change the shape, it will produce the current; power will change shape. Barium Titanate ultrasonic pressure will produce the current size of the current generated by it can detect the strength of the ultrasound; the contrary, the high-frequency current through it, you can generate ultrasound.
        With gold decorative crafts and daily necessities, due to their low hardness, easy to puncture and abrasion can not be durable. When the plated layer of titanium nitride on the surface of these substances, the appearance is almost exactly the same and gold plating, rather than gold, and carbide wear such coating known as a "never wear".
       Organic titanium polymers, can be used as surfactants, dispersants, anti-agent, or rust inhibitor.
        Human use of the four series in the hydrogen storage metal, titanium is one of the cheaper one, but humans did not find a better hydrogen storage metal "Once this issue is resolved, people can use hydrogen fuel.
Titanium aircraft can reduce body weight of 5 tons, carrying passengers more than 100. New jet engines, titanium alloys account for 18 to 25 percent of the overall engine weight; latest supersonic aircraft, the use of titanium, accounting for almost 95% of the total weight of the entire body structure, so if there is no titanium it is difficult to develop the supersonic aircraft.
        Titanium submarines, not only durable than steel submarines, and can sneak into greater depth, titanium submarine can dive to 4500 meters, which is a steel submarines can not go beyond the boundaries. Titanium warships, ships, do not paint, sailing a few years will not rust in salt water. Titanium is not a ferromagnet material, magnetic mines found in the military, especially important if the heat-resistant steel, titanium Make the life of the currently used conventional weapons, rifles and machine guns can only be the first 4.5 seconds .
        Strong absorption of titanium and zirconium on the air, you can remove the air, causing a vacuum. Made of titanium and zirconium alloys, vacuum pumps, air able to get only one-billionth.
         The titanium-niobium alloy is ideal superconducting material. Tsinghua University, using an optical interference principle and ion nitriding titanium handle made of a clear picture of a structured ink painting of mountains and rivers.
        The two most common currently used stainless steel, chrome-nickel titanium 18-8-1 type (including chromium 18%, 8% nickel, 1% titanium) is the most commonly used in the industry.
       Titanium carbide (TiC), rather like the iron carbide, with a metallic luster. May have a higher melting point and higher hardness than iron carbide. Therefore, it has practical value.
        Titanium utensils stored food, color, smell, taste enduring; Titanium cookware is lightweight and will not rust, most science and public health.
A pressure vessel made of titanium alloy that can withstand the high pressure of 2500 atmospheres.
        Titanium and nickel alloys, shape memory alloy. This alloy is made of a pre-determined shape, then to deal with stereotypes, deformation by external forces, a little heat can restore the original look. This alloy has been applied in many fields. Such as the U.S. Apollo spacecraft with the antenna, is this memory alloys