Which of these beetles is the largest?

To me, Titan means bigger than Giant, that's how I got it right.

Myrta Umbellata, my mother was terrified of them and refused to go into caves in case one fell on her head. 😂 in case you're wondering, I've never heard of a weta falling on anyone's head.

Weta are not beetles. They are a type of cricket or Arthropod found in Aotearoa New Zealand. https://en.m.wikipedia.org/wiki/W%C4%93t%C4%81