It is not as easy to follow through on the AI in a rigid rotor as with an articulated head.
I managed it quite well for nearly 2000 hours on the Lynx and I think you mean semi-rigid rotor since the whole point is that the titanium flexes to allow flapping.
Titanium is very strong but also very susceptible to damage which is why scratches can quickly lead to cracks and structural failure and why the heads are inspected so rigorously.