Linked from
The 18 pages that link to Tin, each with the reason it gives.
Bronze AgeRelated: Tin scarcity made access to alloying material a major trade concern.
BronzeRelated: Tin is the traditional alloying ingredient that hardens copper into bronze.
SolderRelated: Tin is the main constituent of common lead-free and tin-lead solders.
Bronze Age EuropeRelated: Its uneven distribution made tin a driver of long-distance exchange.
GalinstanRelated: Tin combines with gallium and indium to form Galinstan’s liquid alloy.