Former England player Olly Barkley scored just over half of Bath's points, through one try, five conversions and four penalties, as the West Country club outscored their visitors by five tries to nil.
Four penalties from Barkley were all Bath had to show in an uninspiring first half – Jason Strange slotted one penalty for Titans – but they upped their levels of play in the second stanza, with centre Andy Higgins crossing in the 42nd minute after a much-improved start to the half.
Barkley converted and he was called upon again just five minutes later, when Andy Beattie scored a try. The 21-year-old Barkley was soon lining up yet another conversion, as Higgins completed his brace, giving Bath a 21-point blitz in just 11 minutes – knocking the stuff out of the Titans, who seemed to tire after their strong start to the game.
The sin-binning of Rotherham's No.6 flank Craig Short in the 46th minute certainly helped Bath's cause – two tries were scored in his absence – replacement scrum-half Charlie Harrison found himself yellow-carded five minutes after Short's return.
With the Titans back down to 14 men, Bath made them pay again, promising prop forward Matt Stevens getting over for a try before Barkley dashed over for his try, converting both of them and completing his haul of 27 points, taking his tally to 81 from just give games this season.
For Bath:Tries: Beattie, Barkley, Stevens, Higgins 2Cons: Barkley 5Pens: Barkley 4
For Rotherham:Pen: Strange