TMT, Thermo Mechanical Treatment, rebars are steel bars that are used for the construction of buildings and other concrete structures like bridges, dams, etc. Concrete has good compressive strength but poor tensile strength and that's why TMT bars are needed to reinforce the cement/concrete. The ribs on the surface of the TMT provides enhanced anchorage in concrete structures so as to hold it in the place and avoid slippage of the concrete materials form the reinforced bars.