The Times of Israel has an interesting story on Joseph Goebbel’s famously overbudget and scandal plagued Titanic movie. Conceived as a means to convey German heroism while depicting how bad British society and capitalists were, it ended up being banned and shown only in occupied countries. The film had a budget of 4 million reichmarks (around 180 million today). They also diverted resources (men and material) for set construction and for set extras. Stories of partying, the director Herbert Selpin in constant turmoil with producers and actors, and Selpin uttering anti-Nazi comments reached Berlin. Selpin was arrested, interrogated, and was found dead in his cell (suicide but most believe he was murdered ). When Goebbel’s saw the final cut, he was not happy. When production started, Germany was master of Europe. But by late 1942 and 1943, the tide of war had changed. It now was in a two front war, being bombed by the allies, and had suffered some defeats. He banned its showing in Germany but allowed it shown in occupied countries, where it was well received. Then the war ended and the movie faded.

But not the end of the story as Wikipedia notes:
Titanic was re-discovered in 1949, but was quickly banned in most western countries. Shortly after the war, the film, dubbed in Russian, was screened across the Eastern Bloc as a “trophy film.” After the 1950s, Titanic went back into obscurity, sometimes showing on German television. In 1992, a censored, low quality VHS copy, was released in Germany. This version deleted the strongest propaganda scenes, which immensely watered down its controversial content. Finally, in 2005, Titanic was completely restored and, for the first time, the uncensored version was released in a special edition DVD by Kino Video.

Four scenes from the movie were incorporated in the 1958 A Night To Remember. Wikipedia says it was of two day scenes of Titanic on calm water, and two clips of an engine room walkway flooding. The restored version is available on Amazon although clips and trailers (and perhaps the full movie as well) are to be found on YouTube.

Sources:
1. Goebbels’ ‘Titanic’ Cinematic Disaster Turns 70 (1 Oct 2013, Times of Israel)
2. Wikipedia:Titanic (1943)
3. Internet Movie Database