钛币已被建议代替传统的镍-铜币。美国伊利诺斯州罗林密多,古尔德公司研究与发展部门已退休的付经理米尔顿·L·塞尔克博士在对国会一个小组所作的评论中作为改革所引用的理由是,减少暴露可能有害的镍颗粒,减轻50％重量,降低一些加工成本。塞尔克博士建议利用粉末钛铸成一元 Titanium coins have been suggested to replace traditional nickel-copper coins. The rationale cited as a reform by Dr. Milton L. Serk, the retired pay manager of the Gore research and development unit in the United States, in a commentary to a congressional group, is to reduce the likelihood of exposure Harmful nickel particles, 50% weight reduction, reducing some processing costs. Dr. Serk suggested using powder titanium cast into a dollar