What is the meaning of Mitis?

A process for producing malleable iron castings by melting wrought iron, to which from 0.05 to 0.1 per cent of aluminum is added to lower the melting point, usually in a petroleum furnace, keeping the molten metal at the bubbling point until it becomes quiet, and then pouring the molten metal into a mold lined with a special mixture consisting essentially of molasses and ground burnt fire clay.

The malleable iron produced by this technique.

mild, mellow, mature, ripe; sweet, juicy, succulent

light, fruitful, mellow.

calm, gentle, placid

peaceful, pleasant, clement, calm

soft, tolerable, meek, peaceful, gentle, mild

accusative plural of mit

Source: wiktionary.org