Titus Pullo was a Roman centurion of the 11th Legion (Legio XI Claudia). He was mentioned very briefly by Julius Caesar in his Commentaries of the Gallic Wars. He became a main character in the HBO series Rome, probably because he was an actual historical figure. However, nothing is known about him except the couple of lines from Caesar.
There were two generals named Titus (probably more), but the most famous were Titus Flavinius Sabinus Vespasianus, who we know as Vespasian, and his son, Titus, of the same name. Vespasian began the siege of Jerusalem, but returned to Rome to take up being emperor and left the siege of Jerusalem to his son Titus. Titus junior is the general that finally broke through the walls and won the battle. It was under this Titus that the second temple was destroyed.