Board Thread:Lore Discussion/@comment-6685058-20130727045056

Though I personally believe he is a god because of three reasons from the Talos wiki page itself
 * In The Elder Scrolls IV: Oblivion, the "blood of a divine" is needed to open the portal to Mankar Camoran's Paradise. The blood used is from the Armor of Tiber Septim, which implies that Tiber Septim indeed became a god.
 * In The Elder Scrolls IV: Knights of the Nine the Blessing of Talos is what allows the player to follow Umaril the Unfeathered into the spirit world and destroy his very soul preventing him from being reborn in oblivion and returning again. The blessing also allows the player to return to his body afterwards, further evidence of Talos' divinity.
 * Tiber Septim is also not to be found in Sovngarde, alongside the other Nord heroes, during the Skyrim quest Sovngarde. This may further imply the claim that he became a god. 