First described by William Sharp Macleay in 1826,[2] it was considered to be the longest stick insect in the world until the discovery of Ctenomorpha gargantua.

Titan stick insects are pale brown-grey in color and can grow up to 26 centimetres (10 in) in body length.

During the mating process, the male connects his abdomen to the lower part of the female's egg compartment.

The eggs look similar to those of the Children's stick insect (Tropidoderus childrenii) but they are black-grey with a small white growth.

Ants pick them up and eat the growth, and leave the egg in the refinery where they hatch.