Method for treatment of timepiece components on a rack characterized in that the method includes the successive steps consisting of: - equipping said rack with a plurality of grippers, all made of the same shape memory alloy, and each arranged to return to a reference shape through heating above a temperature of end of a martensitic transformation (Mf) specific to said shape memory alloy, said grippers each comprising a first strand with at least one distal end arranged for the attachment of a said component; - and: - either at least one said gripper comprising a said first strand which is open at said preparation temperature, and is arranged to be closed on itself in a loop closing around a said component, during a mechanical deformation that is applied thereto, and/or comprising, opposite said distal end thereof, a second strand arranged to form with said first strand a loop closing around a said component during a mechanical deformation that is applied thereto, - or said rack being equipped with at least one means of closure facing at least one said distal end and arranged to form with at least a said first strand a closed loop when said treatment is performed on said rack loaded with said batch; - bringing said rack equipped with said grippers to a temperature higher than said temperature of end of a martensitic transformation (Mf); - once all said grippers have returned to their said reference shape, bringing said rack equipped with said grippers to a preparation temperature, which is the ambient temperature, which is lower than said temperature of end of a martensitic transformation (Mf); - loading said rack, at a loading station at said preparation temperature, with a batch of said components to be treated; - performing said treatment on said rack loaded with said batch; - unloading said treated components from said rack, and characterized in that the loading and unloading of said rack are performed by an automated manipulator at said preparation temperature, which is an ambient temperature lower than said temperature of end of a martensitic transformation (Mf). - equipping said rack with a plurality of grippers, all made of the same shape memory alloy, and each arranged to return to a reference shape through heating above a temperature of end of a martensitic transformation (Mf) specific to said shape memory alloy, said grippers each comprising a first strand with at least one distal end arranged for the attachment of a said component; - and: - either at least one said gripper comprising a said first strand which is open at said preparation temperature, and is arranged to be closed on itself in a loop closing around a said component, during a mechanical deformation that is applied thereto, and/or comprising, opposite said distal end thereof, a second strand arranged to form with said first strand a loop closing around a said component during a mechanical deformation that is applied thereto, - or said rack being equipped with at least one means of closure facing at least one said distal end and arranged to form with at least a said first strand a closed loop when said treatment is performed on said rack loaded with said batch; - either at least one said gripper comprising a said first strand which is open at said preparation temperature, and is arranged to be closed on itself in a loop closing around a said component, during a mechanical deformation that is applied thereto, and/or comprising, opposite said distal end thereof, a second strand arranged to form with said first strand a loop closing around a said component during a mechanical deformation that is applied thereto, - or said rack being equipped with at least one means of closure facing at least one said distal end and arranged to form with at least a said first strand a closed loop when said treatment is performed on said rack loaded with said batch; - bringing said rack equipped with said grippers to a temperature higher than said temperature of end of a martensitic transformation (Mf); - once all said grippers have returned to their said reference shape, bringing said rack equipped with said grippers to a preparation temperature, which is the ambient temperature, which is lower than said temperature of end of a martensitic transformation (Mf); - loading said rack, at a loading station at said preparation temperature, with a batch of said components to be treated; - performing said treatment on said rack loaded with said batch; - unloading said treated components from said rack, and characterized in that the loading and unloading of said rack are performed by an automated manipulator at said preparation temperature, which is an ambient temperature lower than said temperature of end of a martensitic transformation (Mf).