The hoplite ring will work from AK will help too.
However, The tank is the least important of the jobs in Titan. A good tank can help a little with well timed cool downs, but largely it boils down to good healers and DPS being able to move. As a member of my LS once famously drunkenly said (and we oft repeat), the key to titan is: Stay out of the shit, and keep people healed up...