The Top Ten Properties of Titanium

Low density,high specific strength

The density of titanium metal is 4.51g/cm³,which is higher than aluminum but lower than steel,copper,and nickel,but its specific strength ranks first among metals.

Corrosion resistance performance

Titanium is a very active metal with a low equilibrium potential and a strong thermodynamic corrosion tendency in the medium.However,in reality,titanium is very stable in many media,such as oxidizing,neutral,and weakly reducing media,which are corrosion-resistant.This is because titanium and oxygen have a great affinity.In air or oxygen-containing media,a dense,strong adhesion,and inert oxide film is formed on the surface of titanium,protecting the titanium substrate from corrosion.Even due to mechanical wear,it will quickly self heal or regenerate.This indicates that titanium is a metal with a strong tendency towards passivation.The oxide film of titanium always maintains this characteristic when the medium temperature is below 315℃.

In order to improve the corrosion resistance of titanium,surface treatment technologies such as oxidation,electroplating,plasma spraying,ion nitriding,ion implantation,and laser treatment have been developed,which enhance the protective effect of the titanium oxide film and achieve the desired corrosion resistance.A series of corrosion-resistant titanium alloys such as titanium molybdenum,titanium palladium,and titanium molybdenum nickel have been developed to meet the needs of metal materials in the production of sulfuric acid,hydrochloric acid,methylamine solutions,high-temperature wet chlorine gas,and high-temperature chlorides.Titanium castings use Ti-32 molybdenum alloy,and for environments where crevice corrosion or pitting corrosion often occurs,Ti-0.3 molybdenum-0.8 nickel alloy is used,or Ti-0.2 palladium alloy is used locally in titanium equipment,both of which have achieved good performance.

Good heat resistance performance

The new titanium alloy can be used for a long time at temperatures of 600℃or higher.

Good low-temperature resistance performance

Low temperature titanium alloys represented by titanium alloys TA7(Ti-5Al-2.5Sn),TC4(Ti-6Al-4V),and Ti-2.5Zr-1.5Mo exhibit an increase in strength with decreasing temperature,but little change in plasticity.Maintaining good ductility and toughness at low temperatures of-196-253℃,avoiding metal cold brittleness,it is an ideal material for low-temperature containers,storage tanks,and other equipment.

Strong anti damping performance

After being subjected to mechanical and electrical vibrations,titanium metal has the longest self vibration attenuation time compared to steel and copper metals.The performance of titanium can be utilized as a vibrating film for tuning forks,medical ultrasonic crushers,and high-end audio speakers.

Non magnetic and non-toxic

Titanium is a non-magnetic metal that is not magnetized even in high magnetic fields.It is non-toxic and has good compatibility with human tissues and blood,so it is adopted by the medical community.

The tensile strength is close to its yield strength

The performance of titanium indicates that its yield strength ratio(tensile strength/yield strength)is high,indicating poor plastic deformation of metallic titanium materials during forming.Due to the large ratio of yield limit to elastic modulus of titanium,the springback ability of titanium during molding is high.

Good heat exchange performance

Although the thermal conductivity of titanium metal is lower than that of carbon steel and copper,due to its excellent corrosion resistance,the wall thickness of titanium can be greatly reduced.Moreover,the heat exchange between the surface and steam is droplet condensation,reducing the heat group.The lack of scaling on the surface can also reduce thermal resistance,significantly improving the heat transfer performance of titanium.

Low elastic modulus

The elastic modulus of titanium is 106.4GMPa at room temperature,which is 57%of that of steel.

Inhalation performance

Titanium is a highly reactive metal that can react with many elements and compounds at high temperatures.Titanium gas absorption mainly refers to the reaction with carbon,hydrogen,nitrogen,and oxygen at high temperatures.