Smith was a third-round pick by Pittsburgh out of Syracuse in 2006, and he has played in 63 games with the Steelers, St. Louis, Jacksonville and Green Bay. The 6-foot, 200-pound Smith has seven interceptions with 19 starts.
He played in 16 games with Pittsburgh in 2007 with 10 starts that season. Smith played for Jacksonville and Green Bay last season before being placed on injured reserve.
The Titans signed Jordan Babineaux on Friday.