A method of manufacturing a degradable article comprises: forming a mixture comprising composite particles dispersed in a metallic matrix material; the composite particles comprising a carrier and a disintegration agent coated on the carrier or embedded in the carrier, or a combination thereof and having a density that is about 0.2 to about 2.5 equivalents to that of the metallic matrix material when measured under the same testing conditions; and molding or casting the mixture to form a degradable article. The disintegration agent forms a plurality of galvanic cells with the metallic matrix material, or the carrier, or a combination thereof, in the degradable article.