The "Alternate Ending" (where Old Rose meets old Jack) and the "Bow Chase" scene are rarely dubbed in Hindi. You will likely need English subtitles for those.
In a heart-wrenching climax, Jack sacrificed his life to save Rose, allowing her to board a lifeboat. As the ship sank into the freezing ocean, Jack's fate was sealed. Rose, grief-stricken and alone, was rescued by a ship that arrived hours later.