Rayshawn Jenkins hit Titans quarterback Joshua Dobbs from behind, the ball came out and it was returned 37 yards by Josh Allen for a go-ahead score with 2:51 left.
The Jaguars got a stop after that and they're going to the playoffs with a 20-16 win, which boosted their record to 9-8.
Jacksonville will be the fourth seed in the AFC playoffs. It's just the fourth division championship in Jaguars history, and the second since the 1999 season.
The Jaguars got the first overall pick of the NFL draft in 2022 after a disastrous year with Urban Meyer at coach, and now they're going to the playoffs with new coach Doug Pederson.
It was a great turnaround, even within this season. The Jaguars were 3-7 after a loss to the Chiefs on Nov. 13, and won six of seven after that.