As you probably already know, ductility is the ability of a metal to receive permanent deformation without fracturing. Metals that can be formed or pressed into another shape without fracturing are ductile. In general, all metals are ductile at elevated temperatures.
Since metals bend by creating and moving dislocations, the near absence of dislocation motion causes brittleness. On the positive side, the difficulty of moving dislocations makes quasicrystals extremely hard. They strongly resist deformation.
Conductivity in metal is a measure of a material's ability to transmit heat, or electricity (or sound). The reciprocal of conductivity is resistance, or the ability to reduce the flow of those.
Metals are lustrous, malleable, ductile, good conductors of heat and electricity. Other properties include: ... Luster: Metals have the quality of reflecting light from its surface and can be polished e.g., gold, silver and copper.
Chose which one you thing it is.
