Answer:
The correct option is : c. Titanium
Explanation:
1. Type M tool: It belongs to the high- speed group of tool steels and used as a cutting tool material. It is a multi component alloy system Fe–C–X, where X is molybdenum.
2. Stainless steel: It is also called inox steel. It is a steel alloy with about 10.5% chromium and 1.2% carbon by mass.
3. Titanium: It is a chemical element, having atomic number 22 and mass 47.867 u. It is silver lustrous transition metal with a symbol Ti.
4. Brass: It is an alloy of zinc and copper metal.
5. Inconel: It is a family of austenitic nickel-chromium based superalloys.
Therefore, Titanium is not an alloy.
