Titanium

Titanium is a hard, lustrous, silvery metal which is obtained by magnesium or calcium reduction of the tetrachloride. It is a relatively abundant element, there being 5600 ppm in the earth’s crust. It forms a protective oxide coating and, hence, resists corrosion, although powdered metal burns in air. Titanium tends to be inert at low temperatures but will combine with a variety of reagents at elevated temperatures. Titanium and its alloys are characterised by their lightness, strength and corrosion resistance and are used widely in aerospace applications. In addition, these properties also make the material suitable for medical applications (e.g. replacement hip joints). Titanium dioxide, TiO2 is used as a white pigment in paints and plastics as it provides great opacity. The same material is also used in the manufacture of heat resisting and durable glass, the TiO2 replacing certain proportions of the soda. Titanium carbide is used to manufacture cemented carbides.


Symbol
Ti

Discovered
Discovered by Rev. William Gregor in 1791 in Creed, Cornwall, England and, independently, by M.H. Klaproth in 1795 in Berlin, Germany.

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Atomic number 22 Clip
Atomic / Molecular Weight 47.88 gmol-1Clip
Density 4508 kgm-3Clip
Crystal Structure hcp / bcc at 1158K Clip
Lattice constant 295 fmClip
Melting Point 1943 KClip
Boiling Point 3573 KClip
Tensile strength 620000000 Nm-2Clip
Youngs modulus 110000000000 Nm-2Clip
Poissons ratio 0.33 Clip
Linear expansivity 0.0000086 K-1Clip
Specific heat capacity 523 Jkg-1K-1Clip
Thermal conductivity 23 Wm-1K-1Clip
Acoustic wave velocity (longitudinal bulk waves) 6130 ms-1Clip
Acoustic wave velocity (Irrotational waves) 5164 ms-1Clip
Acoustic wave velocity (Shear waves) 3182 ms-1Clip
Acoustic wave velocity (Rayleigh waves) 2958 ms-1Clip
Electrical Conductivity 2380000 Sm-1Clip
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See also: Berzelius, Jons Jakobs, Light Metal, Nonferrous, Periodic Table, Titanium Aluminide, Titanium Carbide, Titanium Diboride, Titanium Dioxide, Titanium II Chloride, Titanium II Oxide, Titanium II Sulphide, Titanium III Chloride, Titanium III Fluoride, Titanium IV Fluoride, Titanium Nitride.

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Subjects: Chemistry


Weblinks:
Titanium Metal Titanium Metal Supply Inc, supplies titanium mill products to the metal finishing industries including aerospace, architectural, automotive, biomedical, chemical processing, industrial, marine, oil, and others.
International Titanium Association Workshops, online extensive description of material and it′s properties along with events.