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Hard to say - I was giving it maximum welly at the time, with both hands. The jaws on the CX do not have as much material on them as, say, the jaws on a Wave do. I doubt if I would've caused similar damage to a Wave. It's the same argument as can be applied to bike frames and components - you want lighter weight? Less/thinner material will achieve that. But don't expect the robustness from those parts that you would otherwise enjoy.
That sounds like the CX I have - I think the carbon fibre bit is meant as a weight saver rather than anything else. BTW I managed to do this to mine, whilst attempting to cut through a Halfords £2.50 cable lock. Replaced immediately under warranty by Snow & Rock, from whom I'd bought it.