I'm mindful of the international legalities involving a sunken warship that is later discovered. The legal title and jurisdiction for the sunken ship rests with the navy or country for which the ship served - whether the wreck is in international waters or in the domestic waters of some country uninvolved with the sinking. In all such cases that I am familiar with that involve war dead, the country with jurisdiction forbids any dismantling or entry into the wreck scene - even though there might be historical or commercial interest in doing so. Nautical charts often identify the location of such wrecks with a note forbidding their disturbance - I am familiar with some such charts around the British Isles.
I suppose that if an ancient wreck, say Phoenician or some no longer extant country, is discovered, then it does become an archeological site and is treated similar to a prehistoric site. If a modern, sunken, naval wreck is to be salvaged, then the human remains are removed and interred someplace and personal effects are preserved.
I think most people would believe this all seems well and proper for a warship. But, for some reason which I can't explain, a commercial wreck, such as Titanic, isn't necessarily accorded the same courtesy or respect.