“…The underlying theme of this article is to present the current state of understanding of cryotreatment of tool steels. It is pertinent to mention here that cryotreatment has also been applied to various class of materials such as structural steels, 8,11 cast irons, 12,13 wide range of non-ferrous alloys, [14][15][16] ceramic materials, 17 polymeric materials, 18 metal matrix composites, 19 ceramic matrix composites, 20,21 polymer matrix composites, 22 bulk metallic glasses 23 and different nano-tubes 24 /wires 25 /particles 26 for different purposes; these aspects are not dealt in this article.…”