Titanium is not a rare metal, on the earth ,the reserves of titanium is 16 times that of the amount of copper, nickel, lead, zinc. The proportion of titanium is only 1 / 2 of iron. But titanium can stand hammering and extending just like copper, In the world of ultra-low temperature, titanium will become more rigid and superconductor performance, otherwise, the steel will become fragile incompetent. 

Titanium has a good acid and alkali corrosion resistance. It will not rust if immersed in the sea after 5 years, otherwise corrosion metamorphism of iron and steel will be degenerate in sea water. Shipping which is made of titanium alloy will not be corroded by sea water. "Titanium submarines" which is made of titanium alloy can sneak into the depth of 4,500 meters in the sea, under water pressure, general steel submarine can easily be crushed more than 300 m water.

"Titanium aircraft" is strong and light in weight. A large titanium aircraft can carry more 100 people than the same weight of ordinary plane, the speed of it is more than 3,000 kilometers per hour; and aluminum aircraft is 2400 km/hour at most. In the aerospace industry, the spacecraft can made of titanium which can prevent to high temperature.

Titanium and nickel can also made up a "memory alloy" which has a memory performance. After a crash deformation, the car shell which is made of "memory alloy" can restore as before, if you wash it only with more than 80 ℃ hot water.

Nowadays the cost of refining titanium is too high, so titanium is only applied to some most important field ,such as aerospace area, electronics industries, the manufacture of precision instruments and so on. With the emergence of various new refining method, titanium metal has been regarded as a very promising metal of its applications.

As a modern materials, stainless steel has a 60 year development history

As long as chose the correct steel, processed properly, used the right maintenance, stainless steel will not produce corrosion, pitting, rust corrosion and abrasion. Stainless steel is one of the highest strength metal materials in building metal materials. Because stainless steel has a good corrosion resistance, it can make the structural components maintain the integrity of engineering design permanently. Chromium stainless steel is also set high mechanical strength and extensibility in one , easy to manufacturing the parts, satisfied with the need of architects and structural designers.