McNair, who limped through the remainder of the season, is expected to require 10-to-12 weeks to recover.
Dr. Burton Elrod, the Titans' team physician, performed the surgery in Nashville.
"We are pleased that the surgery went as expected," Titans general manager Floyd Reese said. "This procedure should alleviate
any future ankle problems and will let him regain full strength sometime in May."
The NFL's co-most valuable player, McNair has been prudent in seeking opinions and alternatives to repairing the injury, and finally opted for surgery after foot specialist Dr. Robert Anderson examined the ankle on Monday in Charlotte, N.C.
McNair is expected to being rehab Wednesday. He'll be on crutches for a week, then in a walking boot for about a month, before being able to start full rehabilitation. The nine-year veteran, coming off his finest season and a campaign in which he finally received recognition for his abilities, expects to be sufficiently recovered to participate in the May and June mini-camps.
He led the league in passing efficiency last season, with a career-best 100.4 rating. He was named as the AFC starter in the Pro Bowl game. In the past McNair had tried to bypass any surgeries but the situation with the ankle, doctors apprised him, was not going to improve without an operation.
One of the NFL's grittiest performers, and known for playing in pain, McNair suffered the ankle injury in a Dec. 7 contest against Indianapolis and the ankle bothered him for the remainder of the season.
McNair missed two games, including the season finale, because of the aggravation the injury caused him. In the playoffs, he wasn't as effective as during the season, throwing just two touchdown passes and four interceptions.
Len Pasquarelli is a senior NFL writer for ESPN.com. Information from The Associated Press was used in this report.