High-strength galvanized steel sheet having excellent formability and crashworthiness

A high-strength galvanized steel sheet having excellent formability and crashworthiness, comprising a substrate and a galvanized layer provided on a surface of the substrate, wherein the substrate has a composition containing, by mass %,

• C:
• 0.05% or more and 0.5% or less, Si:
• 0.01% or more and 2.5% or less, Mn:
• 0.5% or more and 3.5% or less, P:
• 0.003% or more and 0.100% or less, S:
• 0.02% or less, Al:
• 0.010% or more and 0.5% or less, B:
• 0.0002% or more and 0.005% or less, Ti:
• 0.05% or less, a relationship of Ti>4N being satisfied, and the balance comprising Fe and inevitable impurities, and a microstructure containing 60% or more and 95% or less of tempered martensite in terms of area ratio and 5% or more and 20% or less of retained austenite in terms of area ratio, the tempered martensite having an average grain diameter of 5 μM or less.