When looking at the cage or structure used to carry materials into an oven for the annealing process, what material properties are most important? Lets saying during full annealing of aluminum, the oven is heated to 540 degrees Celsius. A cage is used to carry the aluminum into the oven. After the cage with aluminum is finished heating it is dropped into water and cooled to below 35 degrees Celsius. What material properties are most important to reduce the amount the cage deforms? I understand that the design of the cage will help reduce deformation also, but I was just curious about the material itself. I'm assuming the thermal expansion coefficient of the material is important. Are there other properties (hardness, tensile strength, etc?) that are also important to take into consideration?