A high tensile strength galvanized steel sheet having tensile strength of at least 980 MPa and excellent formability, comprising: a hot rolled steel sheet having (i) a composition including by mass %, C: 0.07% to 0.13% (inclusive of 0.07% and 0.13%), Si: 0.3% or less, Mn: 0.5% to 2.0% (inclusive of 0.5% and 2.0%), P: 0.025% or less, S: 0.005% or less, N: 0.0060% or less, Al: 0.06% or less, Ti: 0.10% to 0.14% (inclusive of 0.10% and 0.14%), V: 0.15% to 0.30% (inclusive of 0.15% and 0.30%), Solute V: 0.04% to 0.1% (inclusive of 0.04% and 0.1%), Solute Ti: 0.05% or less, optionally at least one type of elements selected from Cr:1% or less and B: 0.003% or less, optionally at least one type of elements selected from Nb and Mo such that the total content thereof is equal to or lower than 0.01 mass %, and remainder as Fe and incidental impurities, (ii) microstructure with fine carbides dispersion precipitated therein, the fine carbides containing Ti and V and having the average particle diameter of less than 10 nm, as well as having volume ratio with respect to the entire microstructure of at least 0.007, wherein the fine carbides are fine composite carbides of both Ti and V, and (iii) matrix as ferrite phase having area ratio with respect to the entire microstructure of at least 97%; and hot-dip galvanized coating or galvannealed coating formed on a surface of the hot rolled steel sheet, wherein contents of C, Ti, V, S and N, in mass%, satisfy formula and formula below. Ti ≥ 0.10 + N / 14 × 48 + S / 32 × 48 0.8 ≤ Ti / 48 + V / 51 / C / 12 ≤ 1.2 a hot rolled steel sheet having (i) a composition including by mass %, C: 0.07% to 0.13% (inclusive of 0.07% and 0.13%), Si: 0.3% or less, Mn: 0.5% to 2.0% (inclusive of 0.5% and 2.0%), P: 0.025% or less, S: 0.005% or less, N: 0.0060% or less, Al: 0.06% or less, Ti: 0.10% to 0.14% (inclusive of 0.10% and 0.14%), V: 0.15% to 0.30% (inclusive of 0.15% and 0.30%), Solute V: 0.04% to 0.1% (inclusive of 0.04% and 0.1%), Solute Ti: 0.05% or less, optionally at least one type of elements selected from Cr:1% or less and B: 0.003% or less, optionally at least one type of elements selected from Nb and Mo such that the total content thereof is equal to or lower than 0.01 mass %, and remainder as Fe and incidental impurities, (ii) microstructure with fine carbides dispersion precipitated therein, the fine carbides containing Ti and V and having the average particle diameter of less than 10 nm, as well as having volume ratio with respect to the entire microstructure of at least 0.007, wherein the fine carbides are fine composite carbides of both Ti and V, and (iii) matrix as ferrite phase having area ratio with respect to the entire microstructure of at least 97%; and (i) a composition including by mass %, C: 0.07% to 0.13% (inclusive of 0.07% and 0.13%), Si: 0.3% or less, Mn: 0.5% to 2.0% (inclusive of 0.5% and 2.0%), P: 0.025% or less, S: 0.005% or less, N: 0.0060% or less, Al: 0.06% or less, Ti: 0.10% to 0.14% (inclusive of 0.10% and 0.14%), V: 0.15% to 0.30% (inclusive of 0.15% and 0.30%), Solute V: 0.04% to 0.1% (inclusive of 0.04% and 0.1%), Solute Ti: 0.05% or less, optionally at least one type of elements selected from Cr:1% or less and B: 0.003% or less, optionally at least one type of elements selected from Nb and Mo such that the total content thereof is equal to or lower than 0.01 mass %, and remainder as Fe and incidental impurities, (ii) microstructure with fine carbides dispersion precipitated therein, the fine carbides containing Ti and V and having the average particle diameter of less than 10 nm, as well as having volume ratio with respect to the entire microstructure of at least 0.007, wherein the fine carbides are fine composite carbides of both Ti and V, and (iii) matrix as ferrite phase having area ratio with respect to the entire microstructure of at least 97%; and hot-dip galvanized coating or galvannealed coating formed on a surface of the hot rolled steel sheet, wherein contents of C, Ti, V, S and N, in mass%, satisfy formula and formula below. Ti ≥ 0.10 + N / 14 × 48 + S / 32 × 48 0.8 ≤ Ti / 48 + V / 51 / C / 12 ≤ 1.2