Titaniferous high-chromium weathering resistant steel and preparing method thereof

The invention belongs to the field of steel smelting, and particularly relates to titaniferous high-chromium weathering resistant steel and a rolling method thereof. The titaniferous high-chromium weathering resistant steel comprises, by weight, smaller than or equal to 0.07% of C, smaller than or equal to 0.50% of Si, smaller than or equal to 1.5% of Mn, smaller than or equal to 0.02% of P, smaller than or equal to 0.10% of S, 0.20%-0.55% of Cu, 3.00%-5.50% of Cr, 0.10%-0.65% of Ni, 0.04%-0.10% of Ti, and the balance Fe and inevitable impurities. The weathering resistant steel and a preparing method thereof have the beneficial effects that the production cost is low, the technology is simple, the product yield is high, and the comprehensive performance of the weathering resistant steel is superior. The requirement of the existing industry for high weathering resistance of the weathering resistant steel can be met, the requirement for stable mechanical performance of steel can also be met, and especially superior low-temperature impact resistance and good ductility are achieved.