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It was reported that alkali treatment might result in the deterioration of mechanical strength of porous Ti alloy scaffolds and also cause the embrittlement of the struts in the scaffolds .
 manufacturing process: alkali treatment; machanical property: mechanical strength; engineering feature: porous Ti alloy scaffolds; machanical property: embrittlement; machine or equipment: struts; engineering feature: scaffolds
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: alkali treatment; machanical property: mechanical strength; engineering feature: porous Ti alloy scaffolds; machanical property: embrittlement; machine or equipment: struts; engineering feature: scaffolds