Due　to　their　superior　strength　and　shock　resistance,　lattice　core　sandwich　panels　(LCSPs)　have　potential　applications　in　many　fields.　In　this　work,　acoustic　emission　(AE)　technology　was　adopted　to　monitor　three-point　bending　tests　of　titanium　alloy　pyramidal　LCSPs.　Simultaneously,　AE　signals　which　were　collected　during　the　bending　process　were　post-processed　by　cluster　analysis.　The　AE　signals　can　be　divided　into　three　classes　which　correspond　to　three　damage　modes,　specifically　face-sheet　wrinkling,　core　member　buckling　and　face-sheet　crushing.　These　results　offer　guidance　for　deploying　AE　technology　for　structural　health　monitoring　of　titanium　alloy　pyramidal　LCSP　components　during　active　service.