 "Titanic" entered service in April 1912 and sank that month on her maiden voyage after striking an iceberg in the Atlantic Ocean.After the sunken liner was discovered and samples were taken of her rivets and hull plates, forensic engineers reported that the non-ductility of the iron and steel used to build her could have played a significant role in speeding up its structural failure after "Titanic" hit the iceberg.Meanwhile, in the United States and Canada in the first half of the twentieth century, lake freighters built with the improved standards for steel were bumping through Great Lakes ice floes and suffering damage, but not sinking.