The Risers took first strike after the Titans won the toss and elected to field first.
Delbert Gayle (35), Ricardo McIntosh (27) and captain Chadwick Walton (22) did the bulk of the scoring to help the Risers post 106-5 off their 10 overs.
Brian Buchanan (2-23 off two overs) and Errol Thomas (2-15 off two overs) were the best bowlers for the Titans.
In the Titans' turn at the crease, contributions from Sherdon Allen (33), Wayne Davis (22) and Albert Gopie (20) were not enough as they fell agonizingly short of the Risers total, finishing 102-6 off their 10 overs.
Fraser, who has 24 wickets in five first-class matches for the Jamaica Scorpions and West Indies A, was the pick of the bowlers with 3-24 from his two overs, including two wickets in the final over when the Titans needed 13 runs for victory.
He got the wicket of Jamie Merchant (2) off the second ball of the over before a six from Oshane Walters off the penultimate ball of the innings meant the Titans needed five runs from the last ball.
Fraser then dismissed Walters (8) off that final ball to seal the Risers’ second win of the tournament.
After the United Stars won the toss and elected to field, they bowled well to restrict the Titans to 81-8 off their 10 overs.
Sherdon Allen (36) and Oshane Walters (10) were the only Titans batsmen to reach double figures as West Indies U-19 representative Andel Gordon led the United Stars bowling with 3-10 off his two overs.
Dwayne Hamilton also took 2-21 for the United Stars.
The Stars reply never got out of first gear as only Jamaica Scorpions all-rounder Alwyn Williams was able to get to double figures with 16.
At the time the rain came down, the United Stars were teetering at 41-7 off 7 overs. There was no further play as the match was then called off with the Stars 18 runs short of their target via the Duckworth-Lewis method.
The aforementioned Grant produced an excellent spell of bowling, taking 4-9 off his two overs.
The Titans batted first and posted a respectable 101-7 off their 10 overs after the Royals won the toss and chose to field.
Sherdon Allen (25) and Tristan Coleman (19) were the main contributors against a solid all-round bowling effort from the Royals.
The Royals only used five bowlers with Khari Campbell (2-14) and Ryan Francis (2-10) being the two best.
102 proved to be not enough for the Titans to defend against a powerful Royals batting line-up as Surrey needed only 8.3 overs to get to 107-3 and secure a seven-wicket victory.
Jamaica Scorpions wicketkeeper/batsman Romaine Morris (38) and opener Leroy Lugg (31) were the main contributors for the Royals.
West Indies batsman Nkrumah Bonner made 17 and Royals skipper Javelle Glen saw his team get their fifth win in eight matches with 12 not out.
