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So I have a bunch of space pirates who make a living out of stealing spaceships while they are in transit and repurposing then for their own use later. As such, they can’t destroy the ship because, well then the ship would be destroyed and thus unusable. These pirates also have lower tech than the other major players in the galaxy so they don’t have fancy “disable the vessel” energy blasts. So they’ve come up with a very effective strategy.
They come out of hyperspace near their victim and attack their engines with lots of small kinetic projectiles and lasers until the vessel is largely immobile. They then fire their harpoons, which are missiles with thermite warheads that burn though the outer layers of the hull. Several spikes extend from the body of the harpoon, anchoring it to the ship, and a cable extends from the harpoon to the firing ship. Usually multiple ships harpoon the victim and then tow it back to base.
I have a bit of a problem through. Metal cables don’t really seem like they would be strong enough to handle the stresses that would be involved in this situation, so I need a more believable way to anchor the victim to the pirate vessel. Is there some type of alloy or super material that could withstand the stress better, or is it better to just use more harpoons to minimize the stress on an individual? Bonus points for a better harpoon mechanism in general, as the best I could think of was burning into the hull.