... corrosion-resistance. Of course it costs higher. 7 Alloy grade 9, Ti-3Al-2.5V, is the most widely used in ... the similar properties with the grade 7 but costs lesser. 9 Alloy grade 23, Ti-6Al-4V ELI (Extra Low Interstitial ... details:First, packaging with moisture-proof paperSecond, packaging with kraft paper Third, packaging with foam plastics in all side of plywood ...