Fine-scale precipitation and mechanical properties of thin slab processed titanium-niobium bearing high strength steels

► Precipitation and mechanical behavior of Ti-Nb and Ti-Nb-Mo-V steels were elucidated. ► Distribution of precipitates was analyzed with microscopy and diffraction pattern. ► During austenite-ferrite transformation, interface precipitation of NbC was observed. ► Epitaxial precipitation of NbC on TiC surface results in mixed precipitates Ti(Nb)C.