A source told ESPN that they agreed to a four-year, $26 million deal with $12 million guaranteed.
Kline, 28, performed well as a pass-blocking right guard protecting Marcus Mariota for his two seasons in Tennessee after being picked up off waivers in 2016.
Kline has made the most of his career since signing as an undrafted free agent with the New England Patriots in 2013. He has spent most of his career as a starter, bouncing between the left and right guard positions. He has been a two-year starter for the Titans at right guard.
Like most of the Titans' offensive linemen, Kline took a step back in 2017 as a run-blocker. The Titans believe their switch to a zone-blocking scheme will benefit Kline in 2018.
With starting-caliber and dependable offensive linemen becoming harder to find these days, Kline benefited from that.
Kline is the third former Patriots player the Titans have agreed to sign or re-sign this week, joining cornerback Malcolm Butler and running back Dion Lewis.
The Titans are on track to return all five offensive line starters after tendering left guard Quinton Spain, who was a restricted free agent. Spain can still field offers from other teams.