Casting choice is a term used in the metalworking industry to refer to the selection of materials used in the process of casting. The two most common solutions for this term are 'ROD' and 'INGOT'. A ROD is a cylindrical piece of metal that is heated and then cooled to form a solid shape. An INGOT is a large block of metal that is heated and then cooled to form a solid shape. Both rods and ingots are used in the casting process to create a desired shape or object.