This Part of GB/T 20564 specifies the terms and definitions, classification and grade expression method, ordering content, dimension, shape, weight, technical requirements, test methods, inspection rules, package, mark and quality certificate of continuously cold rolled twinning induced plasticity high strength steel sheet and strip. This Part is applicable to steel sheet and strip manufactured automotive complex structural parts, reinforcements, etc., with the thickness of 0.50mm~3.00mm.