I was once told by a friend in his 80's, who passed away several years ago, that in the 1950's or 1960's, there was a plan scrap the Titanic. Apparently, the plan was to find it and raise it for scrap because the metal hadn't been contaminated with the radioactive fallout from all the atomic bomb tests around the world for the previous couple of decades. The plan was to use this metal in X-Ray tubes and/or related equipment. Is there any truth and/or logic in this?
This is what is known as Low-Background Steel, and the primary source was indeed sunken ships. It is indeed needed for highly calibrated medical instruments and physics experimentation equipment. So there is "logic" behind this plan. But I do not know if there is "truth" behind it.
Whether the Titanic itself would have been used for such a thing, I do not know, although it sounds rather imprausible. It is probably a garbled hearing of the information about Low-Background Steel and romantic ideas of raising the Titanic, and conflating them. Unlike the German ships sunk in the Scapa Flow, it would be a much bigger endeavour to raise it, and there are seemingly many better sources (Without it, the world still yet hasn't run out). Further, the Titanic is probably considered more culturally important than other ships.
Nowadays, due to the Partial Test Ban Treaty, atmospheric radiation is low enough, and computer-controlled calibration equipment is sophisticated enough, that Low-Background Steel isn't as important.