Brian Jenner scored two goals in the second half, and goalkeeper Anne-Rene Despens scored 20 exports against Canada.
Abby Rock scored for the Americans while Nicole Hensley stopped 17 shots in the loss.
Hilary Knight passes Hailey Wickenheiser to set the Women’s World Hockey Championship record
The Canadians won the gold in their third major international event in a year.
They beat the US 3-2 in overtime a little over a year ago in Calgary in the World Championships postponed until August due to the COVID-19 pandemic.
Canada also beat the United States 3-2 in the women’s Olympic hockey final in February in Beijing.
This Canadian team was a work in progress throughout the tournament in Denmark as head coach Troy Ryan toyed with his front lines in search of harmony.
Canada and the United States each brought back 18 athletes from their Olympic rosters. The Americans seemed to absorb the changes in the squad, which were faster than Canada.
The United States was undefeated in the final, including a 5-2 win over their arch-rival in the preliminary round, with a goal difference of over 47 goals compared to Canada’s plus 22.
In addition to moving the disc faster and cleaner than it did in the loss to the US, Canada also defended more stubbornly in the box between and below the standoff points.
Opening of Saint Laurent Square in Montreal
After trailing 2-1, the United States came close to reaping a pair of force-playing chances in the third inning, also in a furious final minute with Hensley as an additional attacker.
But a tight-knit Despains nullified the charge throughout the third period when Canada edged out 12-6.
Canada and the United States have met in the final of all but one of the world championships since the inaugural tournament in Ottawa in 1990. Canada lost to Finland hosted by Finland in the semi-finals of 2019.
Canada advanced 2-0 in a quick double of Jenner’s goals until Rocky halved with her fourth force-playing goal of the tournament at 19:39 of the second half.
Amanda Kessel lured Canadian defenders and Despins to her and passed the goal ball to Rocky unchecked to score.
Jenner’s nine goals at the Winter Olympics in February matched a tournament record, but the veteran didn’t score in the world championships until Saturday’s semi-final win over Switzerland.
Jenner beat Hensley with a flick from just below the standoff point to score a powerful goal at 10:54. Jenner scored her first goal from the same area, but from a much steeper angle.
She collected Mary Philip Boleyn’s pass into the high boards, took Hensley deep and handcuffed with a low shot into the far side at 9:30.
Canada beat the United States 5-2 in the first half without goals and went 0 to 2 in strong play.
American striker Alex Carpenter hit the crossbar three minutes before the end of the period.
The 2023 women’s tournament will be held in Canada in an as yet unannounced city, followed by the United States which will host it in 2024.
Canada and the United States will also meet in a seven-match competition series this winter.
The International Ice Hockey Federation introduced a Class A women’s championship in the same year with the Olympic Games for the first time in 2022 to encourage federations to invest more consistently in women’s hockey.
The 10-country field was in Denmark without Russia after it was banned by the IIHF from international tournaments due to that country’s invasion of Ukraine.
The Czech Republic reached the quarter-finals and podium for the first time on Sunday, defeating Switzerland 4-2 to take the bronze.
The Czech was coached in Denmark by Calgary’s Carla McLeod, a former defender on the Canadian team.
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