1579
This process permits the use of high variety of metals and composites such as stainless steel mostly austenitic grades , which are mainly 316 , SS 316L , SS 304L and other exotic metals such as titanium and its alloys , composites and functionally graded materials .
 concept or principle: process; material: metals; material: composites; material: as; material: steel; material: austenitic; material: SS; material: SS; material: metals; material: as; material: alloys; material: composites; material: functionally graded materials
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 concept or principle: process; material: metals; material: composites; material: as; material: steel; material: austenitic; material: SS; material: SS; material: metals; material: as; material: alloys; material: composites; material: functionally graded materials