Aluminium is one of the most commonly used non-ferrous metals in the world. It is the third most abundant element in the Earth's crust right after oxygen and silicon, making it the most abundant metal. It makes up around 8% of the Earth's crust and is so chemically reactive that native specimens are very rare and only occur in extreme reducing environments. The main ore of aluminium is bauxite.
One of its most distinct characteristics is that aluminium possesses very low density as well as its resistance to corrosion (due to a phenomenon called passivation). As for its use, it is indispensable to the aerospace industry and is also a crucial component of transportation and structures such as facades and window frames.