Boston College brought the steamroller.

The No. 1-ranked Eagles flattened Harvard, 8-0, in the opening semifinal of the Women’s Beanpot at Walter Brown Arena on Tuesday.

In the nightcap, Kendall Coyne shook free of Boston University defenders long enough to score two goals as No. 5 Northeastern beat BU, 3-2. Northeastern has won 13 straight games, its longest win streak since the 1988-89 team won 15 in a row.

BC and Northeastern meet for the title next Tuesday at 7:30 p.m. at BU.

For the second consecutive year, the Eagles (28-0-0) came flying into the Beanpot undefeated. If last year’s upset in the Beanpot final at the hands of Harvard threw an earlier unbeaten BC team off its path, this iteration of the Eagles never once wobbled.

Before the game was 10 minutes old, the Eagles had three goals and Harvard’s cupboard was bare. By game’s end, Megan Keller and Alex Carpenter had scored a pair apiece, the Eagles had a 48-12 shot advantage, and Katie Burt picked up her 10th shutout of the season.

“I can’t say enough about how well our team played,’’ said BC coach Katie Crowley. “They put a full 60 minutes together. There were very few times when I thought we made mistakes so as a coach I can’t complain.’’

Last year, BC held its record-breaking unbeaten streak carefully. This time, there’s no stopping to consider the circumstances.

“It’s not something we have to talk about,’’ Crowley said. “We were there last year. We were nervous last year. This year we don’t even talk about it. We just keep trying to get better and play better than the last game we played, That’s more of our focus, the next game.’’

BC’s 28-game undefeated streak matches the program’s longest streak (2014-15).

The Eagles, who outshot Harvard, 19-4, in the first, got two more goals before the period ended, one each from Keller and Carpenter. BC, which entered the game as the national leader in team offense with 5.22 goals per game, already had bettered that average after one period. Ten Eagles picked up a point in the first.

“They were on us right off the bat and we weren’t ready for them unfortunately,’’ said Harvard coach Katey Stone. “They put so much pressure on us we didn’t really have an opportunity for a lot of offense.’’

BC defeated Harvard, 2-0, Jan. 19, so the Crimson had reason to think they had a shot in this game. They were never in it.

The Eagles made it 6-0 at 5:00 when Lexi Bender rapped in Dana Trivigno’s centering pass and Keller boosted it to 7-0 at 8:20 on a sharp-angled shot from the left side. Carpenter finished it off with her second of the game at 11:56 of the third, completing a nifty 2-on-1 with Kenzie Kent.

Harvard (12-9-1), which fell out of the national rankings in mid-January, must regroup.

“Coach always says to have competitive amnesia,’’ said Harvard’s Michelle Picard. “You’ve got to learn from it but also know that that wasn’t us out there. It stings and it hurts but you’ve got to get back out there and be ready to go the next game.’’

Northeastern ran through January with a 10-0-0 slate and will be playing its fourth Beanpot final in four years.

BU tried to keep track of Coyne, but the Northeastern center kept slipping away. Coyne, the nation’s leading goal scorer, who is sometimes billed as the world’s fastest female skater, ran her season total to 38 (a career-best) as the Huskies (24-4-1, claimed their second victory over BU this season.

BU (17-10-2) took a 1-0 lead in the first on Rebecca Russo’s goal and held Coyne in check. But Coyne found a bit of room in the second and made good on it.

With a faceoff to the left of BU goalie Erin O’Neil, Hayley Scamurra pulled the puck back to Coyne at the edge of the circle. Coyne took one step, then carefully placed a shot under the O’Neil’s glove at 2:51.

After NU bumped its lead on a goal from Lauren Kelly at 14:47, Coyne slipped away again in the third, taking a pass from Denisa Krizova and snapping off a shot from the left circle.

When NU took a pair of penalties late in the third, BU pulled the goalie with 2:32 and loaded up for a 6-on-3 surge. Alexis Crossley connected at 18:04 with a shot from the center point as the Terriers closed within one.

“It wasn’t the prettiest win,’’ said NU coach Dave Flint, “We didn’t play great but we all competed and they gutted it out when their backs were against the wall.’’