The effect of temperature on the physical properties of commercially pure titanium is given in Table 3. The Effect of Temperature on the Physical Properties However, the generally accepted value for commercially pure titanium is 0.36 and that for ASTM Grade 5 is 0.31. It is difficult to give a reliable value for Poisson's ratio for titanium alloys since anisotropy leads to small differences in both elastic and shear moduli which, when taken together to calculate Poisson's ratio can lead to values varying from 0.287 to 0.391 for annealed ASTM Grade 5 (Ti-6%Al-4%V) sheet. There is, however, a general tendency for high aluminium containing materials to have a somewhat higher modulus than other alloys. Values of elastic (Young's) modulus typically range from 80 to 125 GPa, but this depends to some extent on the working process used to produce the material and on the directionality of the test material. The permeability of commercially pure titanium is 1.00005-1.0001 at 955 H.m -1. Magnetic PropertiesĬommercially pure titanium and all the titanium alloys are non magnetic. Specific heat does not show any obvious trend, ranging from about 400 to 600 J.kg -1.K -1. Electrical ResistivityĪs may be expected from this, electrical resistivity is relatively high. The titanium alloys generally have even lower thermal conductivities than the commercially pure material. The thermal conductivity of all titanium alloys is relatively low for a metal, although recent work has indicated that the value for commercially pure titanium is actually 21.6 W m -1.K -1, about 32% higher than the value quoted in Table 1. Strength of some titanium alloys at room temperature, normalised by density, compared with other structural metals. In Table 2 the specific strengths of some titanium alloys are compared with those of other structural metals.

Where weight is important, it may be worthwhile to compare specific properties of alloys, e.g. Generally, beta alloys are heavy because they contain alloying constituents such as molybdenum which has a relatively high density. For example, an alloy containing aluminium as an alloying element is likely to be substantially lighter than one containing an appreciable amount of tin. The density of an alloy is dependent upon the amount and density of the alloying constituents. Physical properties of titanium and titanium alloys.

For example, coefficients of thermal expansion range from 7.6x10 -6 K -1 to 9.8x10 -6 K -1. The physical properties of titanium and its alloys are summarised in Table 1, from which it can be seen that there is little variation from one alloy to another.

Density of titanium