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TITANIUM GRADES Table 1 shows some typical titanium grades and their use in industry.

Table 1 - Application Of Selected Titanium Grades

Group
Designation
Conditions Application examples
Commercially

ASTM
Medical equipment, implants, chemical
pure
A
Grades
equipment, marine and aircraft parts

titanium
1-4
α-titanium
A
Ti-5Al-2.5Sn
Aircrafts (compressor blades, pipelines),
alloys
Airframes
near-α-
Welded corrosion-resistance parts
titanium alloys Ti-6Al-1Mo-2Cb-1Ta
R
α-β-titanium Ti-8Al-1Mo-1V DA steam turbine blades
Ti-6Al-4V
A; STA
Turbine and compressor blades,
alloys Ti-7Al-4Mo STA disks, fasteners, rocket parts
Airframes, rocket parts
β- and Ti-13V-11Cr-3Al A; STA Fasteners, stressed structure elements, rocket parts
near Ti-10V-2Fe-3Al STA High-strength parts, airframes, landing gears
β-titanium Ti-5Al-5Mo-- A; STA High-strength parts, airframes, landing gears
alloys 5V-1Cr-1Fe STA High-strength parts, airframes, landing gears
Ti-5Al-5Mo-5V-3Cr
A- annealed, DA - duplex annealed, R - rolled, STA - solution treated and aged
Titanium received its name from Martin Klaproth, a German chemist, one of the discoverers of
titanium in the end of 18th century. Klaproth, who found the oxide of a new metal in an ore, gave
it the name of the mythical giants – the Titans. However, there is another and more exotic version,
according to which the source of the name “titanium” is Titania, the Queen of the Fairies and the
wife of King Oberon in William Shakespeare’s “A Midsummer Night’s Dream” . With the combination
of an ability to withstand titanic stress and its fairylike lightness, titanium fully justifies its name.

α−Τi α−β−Τi β−Τi

Ductility Strength

Fig. 1 Ductility-strength properties of titanium alloys

6 ISCAR