Ten properties and three special functions of titanium

Usually aluminum at 150 ℃, stainless steel at 310 ℃ that is the loss of the original performance, and titanium alloy at 500 ℃ or so still maintain good mechanical properties. When the aircraft speed reaches 2.7 times the speed of sound, the surface temperature of the aircraft structure reaches 230 ℃, aluminum alloys and magnesium alloys can not be used, while titanium alloys can meet the requirements. Titanium's heat resistance is good, it is used for aero-engine compressor disk and blade and the skin of the rear fuselage of the aircraft.

Certain titanium alloys (such as Ti-5AI-2.5SnELI) strength with the reduction of temperature and increase, but the plasticity is not reduced much, in the low temperature still has good ductility and toughness, suitable for use in ultra-low temperature. Can be used in dry liquid hydrogen and liquid oxygen rocket engines, or in manned spacecraft for the use of ultra-low temperature containers and storage tanks.

Is Titanium Magnetic? of course not.Titanium is renowned for its non-magnetic attributes, stemming from its unique crystalline structure devoid of unpaired electrons, making it diamagnetic and impervious to magnetic fields. This intrinsic property ensures that titanium remains unaffected by magnetism, contrasting sharply with metals like iron, cobalt, and nickel, which possess unpaired electrons and exhibit magnetic characteristics when exposed to magnetic forces. The absence of magnetic interference makes titanium an exemplary choice for critical applications in medical devices, aerospace engineering, and chemical processing industries, where magnetic neutrality is crucial for operational integrity and safety. Although titanium alloys could show magnetic traits if contaminated with iron, pure titanium retains its non-magnetic quality, providing a reliable and stable material in environments where magnetic fields could pose risks or interfere with equipment performance. Thus, for industries that prioritize non-interference with magnetic fields, titanium offers unmatched advantages, combining strength, lightweight nature, and corrosion resistance with essential non-magnetic properties, ensuring both functionality and safety in sensitive applications.

A comparison of the thermal conductivity of titanium with other metals is shown in the following table

The thermal conductivity of titanium is small, only 1/5 of that of steel, 1/13 of that of aluminum, and 1/25 of that of copper. poor thermal conductivity is a disadvantage of titanium, but this characteristic of titanium can be exploited in certain situations.

Comparison of the modulus of elasticity of titanium with other metals

The modulus of elasticity of titanium is only 55% of that of steel, and the low modulus of elasticity is a disadvantage when used as a structural material.

Ti-6AI-4V titanium alloy tensile strength of 960MPa, yield strength of 892MPa, the difference between the two is only 58MPa, see the following table

Titanium has a strong bond with hydrogen and oxygen, so it is important to prevent oxidation and hydrogen absorption. Titanium welding should be performed under argon protection to prevent contamination. Titanium tubes and thin plates should be heat treated under vacuum, and a slightly oxidizing atmosphere should be controlled during heat treatment of titanium forgings.

Use titanium and other metal materials (copper, steel) to make bells of exactly the same shape and size. If you strike each bell with the same force, you will find that the sound of the titanium bell lasts longer when it vibrates, that is, the energy given to the bell by striking is not easy to disappear. Therefore, we say that titanium has low damping performance.

This refers to the ability of Ti-50%Ni (atomic) alloy to recover its original shape under certain temperature conditions, calling this material a shape memory alloy.

Refers to the Nb-Ti alloy, when the temperature drops to near absolute zero, Nb-Ti alloy made of wire, will lose resistance, any large current through, the wire will not heat, no energy consumption, Nb-Ti is known as superconducting materials

This refers to the Ti-50%Fe (atomic) alloy, which has the ability to absorb large amounts of hydrogen. Utilizing this feature of Ti-Fe, hydrogen can be stored safely, i.e., it is not necessary to use steel high-pressure cylinders to store hydrogen. Under certain conditions, Ti-Fe can also be used to release hydrogen, and Ti-Fe is called an energy storage material.