"Aluminium alloy" refers to a material made by combining aluminium with one or more other metals. It is a stronger and more durable form of aluminium, which can be used in various applications like making airplanes, cars, or household items.
The engines were all inline - four types, derived from those used in the outgoing 124 range, with a cast iron cylinder block and aluminium alloy cylinder head. (en.wikipedia.org)
The charging pod case / storage case is made of aluminium alloy, very good build and finishing. (gogi.in)
There is a lot of focus on the custom aluminium alloy used, plus the internal steel and copper structure, and glass exterior. (pocket-lint.com)