False-colour transmission electron micrograph of a sample of a 90% titanium 10% nickel alloy. The green area is a particle of Ti2Ni, surrounded by pure titanium (alpha crystalline state) seen as yellow and purple. Ti/Ni alloys such as this form the basis of a family of other alloys, where small amounts of other elements have been added. This family has a variety of uses in aerospace, marine engineering and medicine; the properties of the resultant alloy depend on the type and quantity of extra element added. Magnification: x35, 000 at 6x4.5 size.