“Phase transition” refers to a phenomenon in which some physical properties change rapidly. I focused on the sound produced by abrupt physical changes, particularly paying attention to the sound textures of melting, vaporization, and sublimation. The main material used was ice, and I recorded and utilized the sound when phase transitions occurred in various situations involving ice. The piece consists of two main scenes, distinguished by the time it takes for the material to undergo transformation. I have musically reconstructed changes occurring in both short and long durations, and some scenes blending the two are also included.