Diann Roffe came from fourth-tenths of a second off the lead to tie Tamara McKinney for the women's slalom title Saturday at the U.S. Alpine Ski Championships in Crested Butte, Colo.

Men's favorite Felix McGrath successfully defended his slalom title.

In a racing double-header under sunny skies and warm temperatures, Roffe and McKinney provided the main excitement.

Roffe, who had overtaken McKinney on the second run of Friday's giant slalom to capture her first national title, nearly duplicated that feat Saturday.

McKinney, 26, of Squaw Valley, Calif., had led the first run with a time of 40.53 seconds. Roffe, 21, of Williamson, N.Y., was second at 40.93.

"Winning yesterday gave me confidence to go all-out on the second run today," Roffe said. "I felt I had nothing to lose."

Roffe uncorked a 40.83 on the second run - easily the fastest of the afternoon - and when McKinney managed a 41.23, they finished in a rare tie with aggregate times of 1 minute, 21.76 seconds.

"I skied out of my mind today," Roffe said. "I haven't skied like that in slalom before."

Roffe said her two victories here will serve as a "building block" for next season. The 1985 world champion in giant slalom, Roffe has been plagued by injuries and poor results since then, but she has enjoyed a resurgence in the past three months.

"I'm back, I'm back," she said.

As co-champion, it represented McKinney's seventh national slalom title in the last eight years.

"Every slalom I've finished in the nationals I've won," McKinney said. "This feels pretty good."

McKinney, known to be contemplating retirement, hedged on her future. "I'd like to come back and race another season, but I have to straighten some things out with the team first," she said. "It has nothing to do with how the races have gone. I've had a great season."

McKinney finished third in the World Cup slalom standings and won two medals at the World Championships in Vail, including the gold in the combined.

Eva Twardokens of Reno, Nev., continuing her steady recuperation from knee surgery more than a year ago, wound up third in 1:23.89. Kristi Terzian of Salt Lake City was fourth in 1:24.86, and Beth Madsen of Aspen took fifth in 1:24.87.

McGrath paced both runs of the men's slalom to win that event in 1:31.45. It was his fourth national title - three in slalom and one in giant slalom.

Joe Levins, 20, of White Bear Lake, Minn., was second in 1:32.08. Levins also placed second in Thursday's giant slalom.

Bob Ormsby of Tahoe City, Calif., finished third in 1:32.70, followed by Ian Witter of Keystone in 1:34.74 and Matt Grosjean of Steamboat Springs in 1:34.91.

***** At Lake Placid, N.Y., Trond Arne Bredesen of Norway put together jumps of 84 and 91.5 meters Saturday to take the lead after the ski jumping portion at the Subaru Nordic Combined International.

Bredesen, second in the World Cup standings, totaled 217.2 style and distance points after the 70-meter ski-jumping event. He will have a 28-second lead over Thomas Dufter of West Germany when the 15-kilometer cross-country race is held Sunday morning.

Dufter had jumps of 80 and 88 meters and collected 212.9 points.

Klaus Sulzenbacher of Austria, the World Cup leader, is third with 209.2 points on jumps of 89 and 77 meters.

Joe Holland of Norwich, Vt., is the top U.S. competitor with a 14-place effort. Holland had jumps of 84.5 and 74 meters for 189.2 points.

Forty-five skiers from 12 countries are competing in the Subaru International, the eighth of nine World Cup events this season.

***** And at Are, Sweden, Russ Magnanti and Melanie Palenik led the United States to impressive double wins in the men's and women's aerials at a World Cup freestyle skiing meet.

Magnanti, from Wellesley, Mass., scored 209.50 points in the men's aerials, beating runner-up Trace Worthington of Winter Park, Colo., by more than four points.

Didier Meda of France finished third ahead of Philippe Laroche of Canada, who is second in the overall standings.

Tor Skeie of Norway, who had clinched the overall title before this meet, was seventh.

Palenik, from Littleton, Colo., outclassed a field of 15 for the women's aerials title. She had 138.60 points while second-placed Jodi Spiegel of Quincy, Mass., had 131.76.

Palenik moved to within one point of overall aerials leader Sonja Reichart of West Germany.