To knockout this huge beast you absolutely need way more than 26 cannonballs if the torpor stat is higher than 26k, keep and eye on that...have a tribemate or ally keep checking it with a magnifying glass to make sure you’re gaining torpor with each shot to the head. If the titan does not gain torpor it is either 1.) not moving when yousht it or 2.) not traveling the map enough. Titans WILL NOT gain torpor if it does not travel. There is a limit on how much torpor the titan can gain in the same area. I’d recommend getting at least 100 cannonballs and 100 rockets, a quetz with high weight, and about 15 spare cannons just in case.