Renita I don't think aviation material science is applicable to chastity belts just yet.
We don't have the data for it yet but some think that loose carbon fibres may have a similar to glass and asbestos fibres when it comes to health problems, and the matrix that holds the fibres are usually some kind of resin which can have a wide variety of chemical properties, and fibres may have excellent tension strength but aren't great for impact resistance, so it wouldn't be that useful there. Also to achieve a similar strength to steels applicable to chastity belts, you'd need a lot more material so it would probably end up quite bulky.
Metallic 3D printing? Now that's an area that is applicable to CBs. They 3D print high temperature resistive rigid blades for the newest turbofan engines. A lot of people thought Jura 3D prints his chastity belts but they're actually cast which is simplier to ensure it remains strong (3D printing requires a more complicated strengthening process and is more susceptible to cracking if not done right, so I'm not entirely sure how it works... It is a proprietary innovative field afterall)
Computer technology? Newest aircraft have excellent GPS precision but a lot of that requires a lot of processing power and a minimum of a few hours of no-GPS blackouts to operate as accurate as they do.
Joh You can also include a heat plate which is typically used for electrically-driven small surface cooling, but can also be used to generate electricity. The con is that it would make the wearer feel the outside temperature more readily, it would suck to have in summer and wouldn't work at all if the outside temperature matches the wearer's body temperature (but hey they're wearing a metallic chastity belt, wearing a belt on a hot day would suck anyway?)