{"id":8601,"date":"2026-08-24T03:31:27","date_gmt":"2026-08-24T03:31:27","guid":{"rendered":"https:\/\/ytdfoundry.com\/?p=8601"},"modified":"2026-10-16T09:13:31","modified_gmt":"2026-10-16T09:13:31","slug":"titanium-investment-casting","status":"publish","type":"post","link":"https:\/\/ytdfoundry.com\/de\/blog\/titanium-investment-casting\/","title":{"rendered":"Feinguss von Titan: Kann man Titan gie\u00dfen?"},"content":{"rendered":"

Investment casting titanium is one of the hardest jobs in the whole foundry world, and there’s a good reason for that. Titanium is a reactive metal, so once it melts, it can easily react with both the air and materials inside the mold.<\/p>\n

This the reason why the process needs tighter control from the start of the process. The furnace atmosphere, ceramic shell, pouring conditions, and cooling stage must all be under strict consideration that it\u2019s titanium being worked on.<\/p>\n

So, we’ll be going through what titanium investment casting actually involves, the grades you’ll come across, and where these parts are actually used!<\/p>\n

What Is Titanium Investment Casting?<\/h2>\n

Titanium investment casting is the lost-wax process applied to titanium and its alloys. The part is made in wax, and the wax is covered with ceramic. They\u2019re then melted out to leave an empty space. Molten titanium is poured into that space and allowed to cool.<\/p>\n

The basic idea is the same as other investment casting methods. The difference is that titanium reacts very easily when it\u2019s hot, so the melting and pouring, along with the mold materials all need stricter and tighter control.<\/p>\n

Why Titanium Needs Vacuum Melting<\/h2>\n

Titanium becomes highly reactive once it melts. Even small amounts of oxygen, nitrogen, or hydrogen can change the metal and make the finished casting more brittle. Therefore, vacuum melting needs to be done.<\/p>\n

What Is Vacuum Melting?<\/h2>\n

Vacuum melting means melting materials inside a sealed chamber where there\u2019s absolutely no air. Some systems also use an inert gas like argon to keep air away from the molten metal. This gives the foundry much better control over what the titanium comes into contact with.<\/p>\n

Foundries often use vacuum arc skull melting, where the metal sits in a water-cooled copper crucible and never touches a hot container wall. Cooling helps keep the molten titanium from reacting with the container itself, which reduces contamination before pouring.<\/p>\n

The shell has to change too because ordinary silica shells react with titanium and leave a hardened, contaminated surface layer called alpha case. The alpha case must be chemically milled off afterward. Yttria and zirconia face coats resist that reaction far better, though they cost considerably more.<\/p>\n

Titanium Investment Casting Grades<\/h2>\n

There are a few titanium grades you\u2019ll see more often in investment casting compared to others. The right one depends on the specific traits or the industry where you\u2019ll be using them.<\/p>\n

CP Titanium<\/h3>\n

Commercially pure titanium covers Grades 1 to 4. It\u2019s not as strong as Grade 5, but it gives excellent corrosion resistance. That makes CP titanium a common choice for chemical processing equipment and other parts exposed to harsh liquids or chemicals.<\/p>\n

Grade 23 ELI<\/h3>\n

Grade 23 ELI is a cleaner version of Ti-6Al-4V with tighter limits on elements such as oxygen and iron. It offers better ductility and fracture toughness, which is why it\u2019s widely used for medical implants and other medical titanium castings.<\/p>\n

Ti-6Al-4V (Grade 5)<\/h3>\n

Grade 5 is one of the most common titanium investment casting grades. It has about 6% aluminum and 4% vanadium. Its tensile strength is around 895 MPa, while its density is only about 4.43 g\/cm\u00b3. It can also work at temperatures around 400\u00b0C.<\/p>\n

That mix of low weight and high strength makes Grade 5 especially useful for aerospace and defense parts.<\/p>\n

What Is Titanium Investment Casting Used For?<\/h2>\n

You\u2019ll mostly see titanium investment casting when the specific industry needs high strength and strong corrosion resistance from its parts or components.<\/p>\n

Medical and Dental<\/h3>\n

Titanium is well accepted by the human body and resists corrosion. That\u2019s why dental and medical companies use them for implants and other medical components.<\/p>\n

Defense<\/h3>\n

Thanks to its being lightweight, it\u2019s been an obvious choice for military and defense. Defense parts often need to stay strong without adding unnecessary weight, and titanium is the answer for that. They work well for aircraft and missile systems.<\/p>\n

Marine and Chemical Equipment<\/h3>\n

Titanium handles seawater and harsh chemicals very well. They\u2019re often used for specific material like pumps, valves, and other parts exposed to corrosive conditions.<\/p>\n

Luft- und Raumfahrt<\/h3>\n

Aircraft parts need strength without extra weight. Titanium offers both, making it a strong choice for engine parts, brackets, and structural components.<\/p>\n

Pros and Cons of Titanium Investment Casting<\/h2>\n

Every process has its good and bad takes, and yes, titanium isn\u2019t an exception. In fact, you\u2019ll even realize that titanium’s characteristics are sharper than most. So, let\u2019s take a look at some of the advantages and disadvantages of investment casting titanium.<\/p>\n

Die Vorteile<\/b><\/strong><\/p>\n