Hot-rolled steel sheet

A hot-rolled steel sheet comprising, as a chemical composition, by mass %:

• C:
• 0.040% to 0.150%;
• Si:
• 0.50% to 1.50%;
• Mn:
• 1.00% to 2.50%;
• P:
• 0.100% or less;
• S:
• 0.010% or less;
• Al:
• 0.010% to 0.100%;
• N:
• 0.0100% or less;
• Ti:
• 0.005% to 0.150%;
• B:
• 0.0005% to 0.0050%;
• Cr:
• 0.10% to 1.00%;
• Nb:
• 0% to 0.06%;
• V:
• 0% to 0.50%;
• Mo:
• 0% to 0.50%;
• Cu:
• 0% to 0.50%;
• Ni:
• 0% to 0.50%;
• Sb:
• 0% to 0.020%;
• Ca:
• 0% to 0.010%;
• REM:
• 0% to 0.010%;
• Mg:
• 0% to 0.010%;
• and
• a remainder including iron and impurities,
• wherein, in a microstructure at a ¼ position of a sheet thickness in a sheet thickness direction from a surface,
• by area ratios, a primary phase is 95.00% to 98.00% of bainite, a secondary phase is 2.00% to 5.00% of tempered martensite,
• an average grain size of the secondary phase is 1.5 μm or less,
• a pole density in a (110)<112> orientation is 3.0 or less,
• an average grain size of an iron-based carbide is 0.100 μm or less,
• in a microstructure from the surface to a 1/16 position of the sheet thickness in the sheet thickness direction from the surface, a pole density in a (110)<1-11> orientation is 3.0 or less, and
• a tensile strength TS is 980 MPa or more.