Interesting comments! Attaining low carbon levels (below 0.10 percent) has only been possible for the last 30 years with the advent of more modern process technology.
Low carbon steels offer superior strength and ductility when alloyed and manufactured correctly. Attaining steel strength using carbon is an antiquated method which went out in the 50's.
By the way, the brittle nature of the Titanic's steel at lower temperatures is directly attributed to the presence of MnS (Manganese sulfides); impurities that are easily removed with modern steel-making equipment. I may not be a "wiseGEEK" but I am a metallurgist.