No, Jack the Ripper was not on the Titanic. Jack the Ripper was an unidentified serial killer active in the largely impoverished areas in and around the Whitechapel district of London in 1888. The Titanic, on the other hand, was a British passenger liner that sank in the North Atlantic Ocean in 1912 after striking an iceberg during its maiden voyage from Southampton to New York City.
The timeline of Jack the Ripper’s crimes and the Titanic’s voyage are separated by over two decades. Jack the Ripper’s last known murder was in 1888, while the Titanic sank in 1912. Therefore, it is impossible for Jack the Ripper to have been on the Titanic.
Additionally, there is no historical evidence or records that suggest Jack the Ripper was ever on the Titanic. The identities of the passengers and crew on the Titanic are well-documented, and none of them match the descriptions or theories about Jack the Ripper.