Melting, or fusi, is a physical process that results in the phase transition of a substancefrom a solid to a liquid. This occurs when the internal energy of the solid increases, typically by the application of heat or pressure, which increases the substance's temperature to the melting point. At the melting point, the ordering of ions or molecules in the solid breaks down to a less ordered state, and the solid melts to become a liquid.
Melting PointMelting point is a property of a solid. The melting point is defined as the temperature the solid turns into a liquid. More precisely defined, the melting point is the temperature when the liquid state and the solid state remain in a thermal equilibrium with each other