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If the implant fails due to tubing, does the entire implant (including cylinders) need to be replaced? I ask because I hear that the Titan cylinders are virtually indestructible. I would pray that whenever my next revision happens, that I wouldn’t have to go through the recovery pain of getting new cylinders implanted.

I think that all depends on your anatomy, what failed, etc. Mostly a case-by-case basis.
However, some guys report increased size after a revision. I'm guessing they had a total replacement including the cylinders.

I don’t have a Titan but during my revisions they wanted to replace everything that way they would be new and not have to worry as much about failure after the revision

I'm guessing but I think the whole implant would be replaced for 2 reasons . 1) All coloplast titan sizes 22cm and less come from the factory as one piece . 24cm and up come in 3 pieces ( reservoir, pump and cylinders ) and have to be coupled together by the surgeon. 2) I don't believe you , the surgeon , the insurance company OR Colplast would want to take the risk , pay , or warranty new components with old components. This is just my opinion . I know if I was getting opened up , I'd want the new model with no wear and tear installed.

I had a titan revision because the first Drs. Really screwed me up. The revision replaced cylinders with longer ones and tubing but left the reservoir from the original. It was only a year old at most. The revision surgery was a piece of cake. Quicker recovery, virtually no pain at all and it’s straighter, thicker and something to be proud of now.