F2602　was　combined　with　Al,　B,　and　Mg　to　prepare　the　multi-metal　amphibious　energetic　composites　(MAEC).　Its　oxidation,　ignition,　and　combustion　characteristics　were　investigated　under　an　amphibious　atmosphere　(a　mixture　of　air　and　water　vapour　in　various　proportions).　F2602　accelerated　the　metal　particles＇　low-temperature　oxidation　rate,　whereas　it　reduced　the　degree　of　metal　oxidation.　However,　in　amphibious　atmospheres,　the　oxidation　degree,　reaction　rate,　and　heat　release　all　significantly　increased.　This　is　because　the　HF　produced　by　F2602　reacts　with　boron　particles　to　form　BF3,　which　reacts　with　H2O　to　release　heat　and　couples　with　O2　to　promote　high-temperature　oxidation　and　energy　release　of　metals.　However,　these　gases　promoting　combustion　were　carried　away　by　the　strong　upward　airflow　in　the　laser　experiment,　resulting　in　the　best　ignition　and　combustion　performance　of　MAEC　samples　in　air.　The　combustion-promoting　mechanisms　of　F2602　are　as　follows:　1)　The　HF　produced　by　F2602　reacts　with　the　oxide　layer　to　form　low-boiling-point　metal　fluorides,　thereby　promoting　contact　between　the　metal　core　and　the　oxidising　gas;　2)　The　F　atoms　react　with　metal　particles;　3)　BF3　gas　product　reacts　with　H2O　and　couples　with　O2　to　promote　combustion.　At　low　temperatures,　F2602　first　acts　on　Mg,　followed　by　B　and　Al.　However,　MgF2　tends　to　remain　in　the　sample　in　liquid　form　and　act　as　an　inhibitor.　Therefore,　F2602　has　the　best　combustion-promoting　effect　on　the　boron　particles.　Under　amphibious　atmospheres,　MAEC　samples　exhibit　stable　ignition　performance　and　a　significant　increase　in　combustion　temperature.　Consequently,　multi-metal　composites　modified　with　F2602　show　promise　as　amphibious　energetic　materials.　©　2025　Elsevier　B.V.