Amy Hunter was presented with the SS20 trophy by Cricket Ireland president Donna Armstrong after Dragons completed the clean sweep with a sixth straight win in the afternoon match, beating Typhoons by 11 runs.
It was a case of déjà vu as openers Amy Hunter and Bella Armstrong posted their second century stand of the day, bringing their partnerships tally to 312 before Hunter was leg before to Leah Paul with the score on 141.
Armstrong, who was out for 85 in the morning match could add only five more this time in an innings that included 17 fours.
Their total of 191 for three was under threat for much of the Typhoons reply although the run out of Rebecca Stokell, after she had scored 25 from 13 balls, was ultimately crucial.
Paul hit 45 off 35 balls and Laura Delany was 60 not out from 47 when the overs ran out.
The difference was their lack of boundaries. No-one hit more than five and there were only 19 in the innings; Dragons hit 33 in a game without a single six.
Earlier, Dragons retained the SS20 title with a game to spare after beating Scorchers by 38 runs in their first match of the day.
An opening partnership of 171 between Amy Hunter and Bella Armstrong was seven more than Scorchers managed in their reply, bowled out in the final over.
Armstrong was the first to go, leg before to Sophie McMahon for 85, from 54 balls with 11 fours and three sixes.
Hunter, who was missed on 22 and 31, was finally dismissed in the final over for 89 when she hit her wicket; she faced 58 balls and hit 12 fours as Dragons finished on 202 for four.
While Gaby Lewis was in the middle, Scorchers were on course to chase down the total but her dismissal, much to her surprise, given out lbw for 77 from just 39 balls (14 fours and a six) led to a collapse as the remaining six wickets fell for 38 runs.
Arlene Kelly was the most successful bowler with three for 29.