Cortosis ore actually shorts out lightsaber blades on contact, forcing the wielder to reignite their weapon. Instead of shorting out a Jedi or Sith opponent's blade, the weave simply prevented the lightsaber from cleaving the blade in two at the point of contact. The purpose of the weave may also be due to the expense of cortosis, a weave being a more economical method of hardening melee weapons against lightsabers compared to a more cortosis-rich alloy used in a weapon's construction, allowing more weapons to be made effective versus lightsabers for a given quantity of workable cortosis. This is evidenced by the large numbers of cortosis-weave weapons in use by the time of the Jedi Civil War.