What does quasiductile mean?

Here is some context:
Silicon carbide gives it the hardnes. The carbon fibers give it high mechanical strength and higher fracture toughness that it needs. The resulting quasiductile properties of the ceramic composite material ensure its resistance to high thermal and mechanical load.
(taken from this web page about ceramic brakes – http://www.sglgroup.com/cms/international/products/product-groups/bd/carbon-ceramic-brake-disks/index.html?__locale=en)
Thanks

Bends, cracks, moves, flows, but does not break.

I find the word as useless as you.