You should maybe calculate the energy using i²t and, using a estimate of your trace's mass, the resulting rise in temperature. That will give you an idea whether it vaporizes outright or if it is a matter of minor optimization.
For example, 100A for 1ms over 100mm of 1.5mm² will send any electrician seeing it into convulsions, but the temperature rise is merely around 20K. 10ms will result in 200K, which is not suffered well by most isolating materials.