Why Does Tennesse Titans Have the division?

Answer 1

They were realigned into the new AFC South when the Houston Texans were formed, as it was considered unwieldy to add a seventh team to the AFC Central (the Titans' previous division, now the AFC North) or a sixth team to the AFC East (though either the Titans - the ex-Houston Oilers - or the Houston Texans being in the AFC East would not have been unusual, as the Oilers had been in the AFL's Eastern Division 1960-9).