Titanium powder is commonly sold by dedicated pyrotechnic suppliers, and some metal suppliers. Titanium shavings and curls are sometimes available from places where titanium metal is worked. These are often contaminated with oil which can be removed by washings with white gas or acetone. Titanium curls can be heated in an oven to make them more brittle, which facilitates crushing them into a powder. Ball milling of titanium to very fine powders can be made pyrophoric and due to the hardness of the material it is likely to cause excessive damage to the Barrel and Media.