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For AM produced porous Ti alloys , powders tend to become small liquid spheres when heated up by laser or electron beams .
 manufacturing process: AM; machanical property: porous; material: alloys; material: powders; enabling technology: laser; concept or principle: electron beams
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:
 manufacturing process: AM; machanical property: porous; material: alloys; material: powders; enabling technology: laser; concept or principle: electron beams