Abstract: In thin slab continuous casting and continuous rolling process,by researching the Ti micro-alloying technology,the problem of mechanical performance undulation with Ti micro-alloying was solved effectively, and high strength weathering steels were developed,the yield strength is 450~700 MPa.The microstructure performance and the industrialized application of steel were studied,which shows that the tested steel has better the mechanical performance all of the coil along longitudinal direction,the forming performance and the welding performance,The quality of the tested steel satisfies the request in the container and the automobile manufacture industry,and it has the broad market prospect.