I was a bit worried about my abilities to do huge climbs too, but in reality, it wasn't so bad, with plenty of regular rest breaks and deep breathing! Haven't gone up Titan yet, but I've done a few 120m mine shaft climbs in around 40 mins, which astounded me, to be honest, given my lack of experience and strenuous exercise. I wasn't skipping around at the top, I can tell you, but it didn't take very long to recover either. I'd struggled at first, but then someone pointed out to me the rather obvious size differential between my thigh and bicep muscles, and that made me realise my technique was a little 'top-heavy' and things picked up immediately.
I find a little hyperventilation before startup works wonders too at getting past the stretchy 'bell-ringing' stage...