What the title says. I noticed the description for Tungsten tells us it's brittle, but it's not. On wiki you might get confused when it says Tungsten is brittle in its raw form. But when it says raw, it means unrefined. (as in contaminated). The substitution and interstitial impurities it has when it's mined out of the ground makes it harder at the cost of ductility (like most metals).

Pure tungsten is both ductile and very hard.