Fisk will likely move in as the Titans' starting left defensive tackle, replacing Gary Walker, who signed a five-year, $18 million deal with Jacksonville.
The Vikings were unable to retain Fisk after re-signing safety Robert Griffith, linebacker Ed McDaniel, safety Orlando Thomas and returner David Palmer to multi-year deals.
Fisk, 26, is best known for recording two sacks in the NFC championship against Atlanta. He had 25 tackles, 1 1/2 sacks, 19 quarterback pressures, a forced fumble and a fumble recovery last season.
Originally a seventh-round pick in 1995 out of Stanford, Fisk has played in 56 NFL games and amassed 107 tackles, including 5 1/2 sacks.
Since the free agency period started February 12, the Titans added defensive end Mike Jones and fullback Lorenzo Neal while retaining linebacker Eddie Robinson.
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