A 3-pointer by Stewart stretched the lead back to 37-18 and forced Versyp to call a timeout, during which she was hit with a technical foul for comments she made to the referees.
A driving layup by Bria Hartley made it 46-26 at halftime. The Huskies increased that to 69-39 midway through the second half, and led by as many as 40.
Purdue's Sam Ostarello, who leads the team in rebounding and had 15 points and 15 in the Boilermakers' win over Wake Forest on Friday night, picked up her fourth foul early in the second half. She finished scoreless with no rebounds.
Stewart matched her season average Saturday after a 20-point, 10-rebound performance in the Huskies' win over Marist on Friday night.
"I think she showed over these last three games that she's got an awful lot of ways to help her team," Auriemma said. "Whether it's offensively making jump shots or whether it's getting in the lane. Defensively, it's blocking shots. She just has an awful lot of skills that over three games in one place, a lot of people are going to notice."
"I'll remember having a great experience with the team, just going out and winning the whole thing and having a great time doing it," Stewart said.
Connecticut has won 49 straight games in regular-season tournaments, dating back to December, 1992 and a loss to Vanderbilt in the Hilton Head Super Shootout.
The Huskies also improved to 5-1 against the Boilermakers and have won five straight in the series. UConn's only loss came in 1990. They last met in the second round of the 2011 NCAA tournament, where the Huskies won 64-40.
The win improves Connecticut's record against ranked teams to 185-58.
Purdue has never beaten a No. 2-ranked team, falling to 0-7 all-time.
The Boilermakers, who beat Marist on Thursday and Wake Forest on Friday, finished the tournament at 2-1.