Slit'ting adjective & noun from Slit . Slitting file . See Illust. (i) of File . -- Slitting mill . (a) A mill where iron bars or plates are slit into narrow strips, as nail rods, and the like . (b) A machine used by... Found on http://www.encyclo.co.uk/webster/S/123
A process of converting sheet in coils into strip by passing the metal through a machine with multiple rotary knives. Found on http://www.metalbulletin.com/Glossary.html
Cutting a sheet of steel into narrower strips to match customer needs. Because steel mills have limited flexibility as to the widths of the sheet that they produce, service centers normally will cut the sheet for the customer. Found on https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/