Progress in partially degradable titanium-magnesium composites used as biomedical implants.

Area of Science:

• Biomaterials Science
• Materials Engineering
• Biomedical Engineering

Background:

• Titanium-magnesium composites are emerging as promising partially degradable biomaterials.
• They integrate the bioactivity of magnesium with the robust mechanical properties of titanium.
• Conventional mechanically alloyed titanium-magnesium alloys present limitations for bioimplant applications.

Purpose of the Study:

• To review preparation methods for titanium-magnesium composites for bioimplants.
• To evaluate the mechanical properties and degradation behavior of these composites.
• To assess the feasibility and future development of titanium-magnesium composites as bio-implants.

Main Methods:

• Discussion of limitations of conventional mechanically alloyed titanium-magnesium alloys.
• Summary of three preparation methods: melt infiltration casting, powder metallurgy, and hot rotary swaging.
• Comprehensive evaluation of mechanical properties and degradation behavior.

Main Results:

• Melt infiltration casting, powder metallurgy, and hot rotary swaging are suitable preparation methods.
• Each method presents distinct advantages and disadvantages.
• Titanium-magnesium composites demonstrate potential for bioimplant applications.

Conclusions:

• Titanium-magnesium composites show feasibility as bio-implants.
• Further development is possible for tailored biodegradation.
• This review provides a toolkit for designing locally biodegradable titanium-magnesium composites.