"Those are the type of plays you can make if you're really locked in mentally, where you can just go get it and react."
The sequence finished off the Thunder's big fourth-quarter run and effectively put the game away.
"We got enough stops. That was big. We finally were getting some stops and created some separation," Collison said.
Wesley Matthews chipped in 17 points and J.J. Hickson contributed 14 points and 12 rebounds, seven on the offensive end, for Portland. Lillard, who joined Oscar Robertson and Isiah Thomas as the only players with at least 20 points and 10 assists in an NBA debut, had seven assists and two turnovers.
"It's not really about how I play," said Lillard, the No. 6 pick in this year's draft. "It's more about the team making a few more shots to get the win."
Durant scored seven points in the middle of an 11-0 run as the Thunder recovered from an early deficit to take a 24-18 lead after Martin's jumper from the left wing, his first basket at home with his new team.
Portland rallied to go ahead briefly with the first eight points of the second quarter, only for Martin to hit a 3 and start a 7-0 response that put Oklahoma City back on top to stay.
"When you talk about chemistry with our group, you haven't been around our group," Thunder coach Scott Brooks said. "James was a good player but it wasn't Dr. James. He wasn't helping the group stick together. All the guys do that."
As a group, the Thunder bench outscored Portland's reserves 42-15.
"You have to have a punch coming off the bench. I think that's one of our biggest strengths right now," Martin said.
"We've just got to keep on jelling as a group and help the first unit when they need a little rest."
NOTES: Durant had 12 points and 10 rebounds in the first half. It was only the second time in his career that he had a double-double by halftime. The other time came March 9, 2011, against Philadelphia. He said afterward that he has set a goal of averaging a double-double this season. ... The Houston at Oklahoma City game on Nov. 28, marking Harden's only return to Chesapeake Energy Arena of the season, was picked up by NBA TV on Friday. The network also dropped its coverage of a Portland-Oklahoma City rematch on Jan. 13 and added Tuesday's Thunder-Raptors game. ... Rookie Jeremy Lamb, one of Oklahoma City's acquisitions in the trade for Harden, entered late and hit a 3-pointer for his first NBA points.