👉 The term "corrugation" is often used in the context of engineering and physics, particularly in the study of materials. It refers to the irregular or uneven shape that can be produced by heat treatment processes such as annealing, which involves heating a material at high temperatures for a long period of time. The process causes the atoms within the material to rearrange themselves in an irregular pattern, resulting in the formation of small gaps or ridges between the atoms. In other words, corrugation