No. It was entirely fictional.
No. The love story between Jack and Rose was a creation for the movie. Although the movie was centered around the real - life event of the Titanic sinking, the specific story of their love was not based on any real - life accounts. It was designed to make the movie more appealing and to show different aspects of human nature during such a disaster. For example, their relationship showed the power of love in the face of extreme danger and tragedy, which was a fictional element added to the historical context of the Titanic.