As far as I know since it had living quarters it's a titan 1. I think later they realized having to staff the silo was a liability from a trust standpoint and I believe titan 2 silos were remotely controlled.

In the page you linked it's almost almost a 1:1 of the black and white 3d cutaway labeled Underground Missile Silo Dead Media Archive

As far as I know since it had living quarters it's a titan 1. I think later they realized having to staff the silo was a liability from a trust standpoint and I believe titan 2 silos were remotely controlled.