When tin roofing began being used centuries ago, it quickly became a very popular roofing material since it was lightweight and easy to work with. Today, tin roofs are no longer installed. When you hear someone refer to a "tin roof", they are usually referring to galvanized steel or aluminum which can mimic the appearance of tin.
Stainless Steel Roofing
Stainless steel is a durable metal made up of 10.5% chromium. Due to it's high price, which is comparable to copper or zinc, stainless steel is not a commonly used roofing material.